How did the Cold War end?

End of the Cold War – While many observers state the 1989 Malta Summit was the end of the Cold War, it was December 1991 before the Presidents of the United States and the Soviet Union formally recognised the conflict's end, with the Soviet Union also being dissolved at that time. Some key events leading up to the end include:

Outline of the Cold War

The following outline is provided as an overview of and topical guide to the Cold War:

Cold War – period of political and military tension that occurred after World War II between powers in the Western Bloc (the United States, its NATO allies and others) and powers in the Eastern Bloc (the Soviet Union and its allies in the Warsaw Pact). Historians have not fully agreed on the dates, but 1947–1991 is common. It was termed as "cold" because there was no large-scale fighting directly between the two sides. Based on the principle of mutually assured destruction, both sides developed nuclear weapons to deter the other side from attacking. So they competed against each other via espionage, propaganda, and by supporting major regional wars, known as proxy wars, in Korea, Vietnam and Afghanistan.

Cold War participants – the Cold War primarily consisted of competition between the Eastern Bloc and the Western Bloc. While countries and organisations explicitly aligned to one or the other are listed below, this does not include those involved in specific Cold War events, such as North Korea, South Korea, and Vietnam. It also does not include countries such as China which, while not aligned to either blocs, still played an influential part in the Cold War.

Eastern Bloc – the communist side of the Cold War conflict, including the Soviet Union and its satellite states in Eastern Europe. Organizations that the Soviet Union created in order to solidify its control over Eastern Europe, and which tied the Eastern Bloc together, included:Additionally, the Byelorussian Soviet Socialist Republic (Byelorussia) and the Ukrainian Soviet Socialist Republic (Ukraine) were represented separately in the United Nations in addition to the Soviet Union.

Western Bloc – the United States and countries allied with it against the Soviet Union and the rest of the Eastern Bloc during the Cold War. As part of its Containment policy, the United States backed a series of regional alliances:

Timeline of events in the Cold War

Origins of the Cold War – the Cold war was a major part of the aftermath of World War II, and was caused by frictions in the relations between the Soviet Union and the allies (United States, United Kingdom, and France) that emerged during and after the Second World War.

Cold War organisations – throughout the Cold War a series of organisations were created to either further the goals of individual and groups of states, or to act as intermediaries in reducing the tension.Conflicts related to the Cold War – there were a number of conflicts during the Cold War, and none of them escalated to direct fighting between the superpowers (which would have constituted a hot war). Some of them were:

Proxy wars of the Cold War – while the superpowers never engaged each other directly, they fought a series proxy wars throughout the period of Cold War, with one, or both sides arming or otherwise supporting one side against another.US-USSR confrontations during the Cold War – while open conflict did not break out between the two superpowers during the Cold War, there were some very intense confrontations that seemed likely to trigger World War III. As the Cold War stretched on, the main concern became the possibility of a nuclear exchange—the ultimate fear characterizing East-West tensions. Some of these confrontations included:


where was General Augusto Pinochet born?

Pinochet was born in Valparaíso, the son of Augusto Pinochet Vera, a descendant of an 18th-century French Breton immigrant from Lamballe, and Avelina Ugarte Martínez, a woman whose family had been in Chile since the 17th century and was of partial Basque descent. Pinochet went to primary and secondary school at the San Rafael Seminary of Valparaíso, the Rafael Ariztía Institute (Marist Brothers) in Quillota, the French Fathers' School of Valparaíso, and then to the Military School in Santiago, which he entered in 1931. In 1935, after four years studying military geography he graduated with the rank of "alférez" (Second Lieutenant) in the infantry. In September 1937, Pinochet was assigned to the "Chacabuco" Regiment, in Concepción. Two years later, in 1939, then with the rank of Sub-lieutenant, he moved to the "Maipo" Regiment, garrisoned in Valparaíso. He returned to Infantry School in 1940. On 30 January 1943, Pinochet married Lucía Hiriart Rodríguez, with whom he had five children: Inés Lucía, María Verónica, Jacqueline Marie, Augusto Osvaldo and Marco Antonio.

Augusto Pinochet

Augusto José Ramón Pinochet Ugarte (; ; 25 November 1915 – 10 December 2006) was a Chilean general, politician and US-backed dictator of Chile between 1973 and 1990 who remained the Commander-in-Chief of the Chilean Army until 1998 and was also President of the Government Junta of Chile between 1973 and 1981.
Pinochet assumed power in Chile following a United States-backed coup d'état on 11 September 1973 that overthrew the democratically elected socialist Unidad Popular government of President Salvador Allende and ended civilian rule. Several academics – including Peter Winn, Peter Kornbluh and Tim Weiner – have stated that the support of the United States was crucial to the coup and the consolidation of power afterward. Pinochet had been promoted to Commander-in-Chief of the Army by Allende on 23 August 1973, having been its General Chief of Staff since early 1972. In December 1974, the ruling military junta appointed Pinochet Supreme Head of the nation by joint decree, although without the support of one of the coup's instigators, Air Force General Gustavo Leigh. Following his rise to power, Pinochet persecuted leftists, socialists, and political critics, resulting in the executions of from 1,200 to 3,200 people, the internment of as many as 80,000 people and the torture of tens of thousands. According to the Chilean government, the number of executions and forced disappearances was 3,095.

Under the influence of the free market-oriented neoliberal "Chicago Boys", Pinochet's military government implemented economic liberalization, including currency stabilization, removed tariff protections for local industry, banned trade unions and privatized social security and hundreds of state-owned enterprises. These policies produced high economic growth, but critics state that economic inequality dramatically increased and attribute the devastating effects of the 1982 monetary crisis on the Chilean economy to these policies. For most of the 1990s, Chile was the best-performing economy in Latin America, though the legacy of Pinochet's reforms continues to be in dispute. His fortune grew considerably during his years in power through dozens of bank accounts secretly held abroad and a fortune in real estate. He was later prosecuted for embezzlement, tax fraud and for possible commissions levied on arms deals.

Pinochet's 17-year rule was given a legal framework through a controversial 1980 plebiscite, which approved a new constitution drafted by a government-appointed commission. In a 1988 plebiscite, 56% voted against Pinochet's continuing as President, which led to democratic elections for the presidency and Congress. After stepping down in 1990, Pinochet continued to serve as Commander-in-Chief of the Chilean Army until 10 March 1998, when he retired and became a senator-for-life in accordance with his 1980 Constitution. However, Pinochet was arrested under an international arrest warrant on a visit to London on 10 October 1998 in connection with numerous human rights violations. Following a legal battle, he was released on grounds of ill-health and returned to Chile on 3 March 2000. In 2004, Chilean Judge Juan Guzmán Tapia ruled that Pinochet was medically fit to stand trial and placed him under house arrest. By the time of his death on 10 December 2006, about 300 criminal charges were still pending against him in Chile for numerous human rights violations during his 17-year rule and tax evasion and embezzlement during and after his rule. He was also accused of having corruptly amassed at least 28 million USD. Despite the indictment and 300 charges, he only served time in house arrest.

By late 1945, Pinochet had been assigned to the "Carampangue" Regiment in the northern city of Iquique. Three years later, he entered the but had to postpone his studies because, being the youngest officer, he had to carry out a service mission in the coal zone of Lota. The following year he returned to his studies in the Academy, and after obtaining the title of Officer Chief of Staff, in 1951, he returned to teach at the Military School. At the same time, he worked as a teachers' aide at the War Academy, giving military geography and geopolitics classes. He was also the editor of the institutional magazine "Cien Águilas" ("One Hundred Eagles"). At the beginning of 1953, with the rank of major, he was sent for two years to the "Rancagua" Regiment in Arica. While there, he was appointed professor of the Chilean War Academy, and returned to Santiago to take up his new position.

In 1956, Pinochet and a group of young officers were chosen to form a military mission to collaborate in the organization of the War Academy of Ecuador in Quito. He remained with the Quito mission for four-and-a-half years, during which time he studied geopolitics, military geography and military intelligence. At the end of 1959 he returned to Chile and was sent to General Headquarters of the 1st Army Division, based in Antofagasta. The following year, he was appointed commander of the "Esmeralda" Regiment. Due to his success in this position, he was appointed Sub-director of the War Academy in 1963. In 1968, he was named Chief of Staff of the 2nd Army Division, based in Santiago, and at the end of that year, he was promoted to brigadier general and Commander in Chief of the 6th Division, garrisoned in Iquique. In his new function, he was also appointed Intendent of the Tarapacá Province.

In January 1971, Pinochet was promoted to division general and was named General Commander of the Santiago Army Garrison. At the beginning of 1972, he was appointed General Chief of Staff of the Army. With rising domestic strife in Chile, after General Prats resigned his position, Pinochet was appointed commander-in-chief of the Army on 23 August 1973 by President Salvador Allende just the day after the Chamber of Deputies of Chile approved a asserting that the government was not respecting the Constitution. Less than a month later, the Chilean military deposed Allende.

On 11 September 1973, the combined Chilean Armed Forces (the Army, Navy, Air Force, and Carabineros) overthrew Allende's government in a coup, during which the presidential palace, La Moneda, was shelled and Allende committed suicide. While the military claimed that he had committed suicide, controversy surrounded Allende's death, with many claiming that he had been assassinated (a theory discarded by the Chilean Supreme Court in 2014).

In his memoirs Pinochet said that he was the leading plotter of the coup and had used his position as commander-in-chief of the Army to coordinate a far-reaching scheme with the other two branches of the military and the national police. In later years, however, high military officials from the time have said that Pinochet reluctantly became involved only a few days before the coup was scheduled to occur, and followed the lead of the other branches (especially the Navy, under Merino) as they executed the coup.

The new government rounded up thousands of people and held them in the national stadium where many were killed. This was followed by brutal repression during Pinochet's rule, during which about 3,000 people were killed, and more than 1,000 are still missing.

In the months that followed the coup, the "junta", with authoring work by historian Gonzalo Vial and admiral Patricio Carvajal, published a book titled "El Libro Blanco del cambio de gobierno en Chile" (commonly known as "El Libro Blanco", "The White Book on the Change of Government in Chile"), where they said that they were in fact anticipating a self-coup (the alleged "Plan Zeta", or Plan Z) that Allende's government or its associates were purportedly preparing. United States intelligence agencies believed the plan to be untrue propaganda. Although later discredited and officially recognized as the product of political propaganda, Gonzalo Vial insists in the similarities between the alleged Plan Z and other existing paramilitary plans of the Popular Unity parties in support of its legitimacy.

Canadian Jean Charpentier of Télévision de Radio-Canada was the first foreign journalist to interview General Pinochet following the coup.

The Church Report investigating the fallout of the Watergate scandal stated that while the U.S. tacitly supported the Pinochet government after the 1973 coup, there was "no evidence" that the US was directly involved in the coup. This view has been contradicted by several academics, such as Peter Winn, who writes that the role of the CIA was crucial to the consolidation of power after the coup; the CIA helped fabricate a conspiracy against the Allende government, which Pinochet was then portrayed as preventing. He stated that the coup itself was possible only through a three-year covert operation mounted by the United States. He also points out that the US imposed an "invisible blockade" that was designed to disrupt the economy under Allende, and contributed to the destabilization of the regime. Author Peter Kornbluh argues in his book "The Pinochet File" that the US was extensively involved and actively "fomented" the 1973 coup. Authors Tim Weiner, in his book,, and Christopher Hitchens, in his book, "The Trial of Henry Kissinger" similarly argue the case that US covert actions actively destabilized Allende's government and set the stage for the 1973 coup.

The U.S. provided material support to the military government after the coup, although criticizing it in public. A document released by the U.S. Central Intelligence Agency (CIA) in 2000, titled "CIA Activities in Chile", revealed that the CIA actively supported the military junta after the overthrow of Allende, and that it made many of Pinochet's officers into paid contacts of the CIA or U.S. military, even though some were known to be involved in human rights abuses. The CIA also maintained contacts in the Chilean DINA intelligence service. DINA led the multinational campaign known as Operation "Condor", which amongst other activities carried out assassinations of prominent politicians in various Latin American countries, in Washington, D.C., and in Europe, and kidnapped, tortured and executed activists holding left-wing views, which culminated in the deaths of roughly 60,000 people. The United States provided key organizational, financial and technical assistance to the operation. CIA contact with DINA head Manuel Contreras was established in 1974 soon after the coup, during the Junta period prior to official transfer of Presidential powers to Pinochet; in 1975, the CIA reviewed a warning that keeping Contreras as an asset might threaten human rights in the region. The CIA chose to keep him as an asset, and at one point even paid him. In addition to the CIA's maintaining of assets in DINA beginning soon after the coup, several CIA assets, such as CORU Cuban exile militants Orlando Bosch and Guillermo Novo, collaborated in DINA operations under the Condor Plan in the early years of Pinochet's presidency.

A military junta was established immediately following the coup, made up of General Pinochet representing the Army, Admiral José Toribio Merino representing the Navy, General Gustavo Leigh representing the Air Force, and General César Mendoza representing the "Carabineros" (national police). As established, the junta exercised both executive and legislative functions of the government, suspended the Constitution and the Congress, imposed strict censorship and curfew, banned all parties and halted all political and perceived subversive activities. This military junta held the executive role until 17 December 1974, after which it remained strictly as a legislative body, the executive powers being transferred to Pinochet with the title of President.

The junta members originally planned that the presidency would be held for a year by the commanders-in-chief of each of the four military branches in turn. However, Pinochet soon consolidated his control, first retaining sole chairmanship of the military junta, and then proclaiming himself "Supreme Chief of the Nation" (de facto provisional president) on 27 June 1974. He officially changed his title to "President" on 17 December 1974. General Leigh, head of the Air Force, became increasingly opposed to Pinochet's policies and was forced into retirement on 24 July 1978, after contradicting Pinochet on that year's plebiscite (officially called Consulta Nacional, or National Consultation, in response to a UN resolution condemning Pinochet's government). He was replaced by General Fernando Matthei.

Pinochet organized a plebiscite on 11 September 1980 to ratify a new constitution, replacing the 1925 Constitution drafted during Arturo Alessandri's presidency. The new Constitution, partly drafted by Jaime Guzmán, a close adviser to Pinochet who later founded the right-wing party Independent Democratic Union (UDI), gave a lot of power to the President of the Republic—Pinochet. It created some new institutions, such as the Constitutional Tribunal and the controversial National Security Council (COSENA). It also prescribed an 8-year presidential period, and a single-candidate presidential referendum in 1988, where a candidate nominated by the Junta would be approved or rejected for another 8-year period. The new constitution was approved by a margin of 67.04% to 30.19% according to official figures; the opposition, headed by ex-president Eduardo Frei Montalva (who had supported Pinochet's coup), denounced extensive irregularities such as the lack of an electoral register, which facilitated multiple voting, and said that the total number of votes reported to have been cast was very much larger than would be expected from the size of the electorate and turnout in previous elections. Interviews after Pinochet's departure with people involved with the referendum confirmed that fraud had, indeed, been widespread. The Constitution was promulgated on 21 October 1980, taking effect on 11 March 1981. Pinochet was replaced as President of the Junta that day by Admiral Merino.

Armed opposition to the Pinochet rule continued in remote parts of the country. In a massive operation spearheaded by Chilean Army para-commandos, some 2,000 security forces troops were deployed in the mountains of Neltume from June to November 1981, where they destroyed two MIR bases, seizing large caches of munitions and killing a number of guerrillas.

According to author Ozren Agnic Krstulovic, weapons including C-4 plastic explosives, RPG-7 and M72 LAW rocket launchers, as well as more than 3,000 M-16 rifles, were smuggled into the country by opponents of the government.

In September, weapons from the same source were used in an unsuccessful assassination attempt against Pinochet by the FPMR. His military bodyguard was taken by surprise, and five members were killed. Pinochet's bulletproof Mercedes Benz vehicle was struck by a rocket, but it failed to explode and Pinochet suffered only minor injuries.

Almost immediately after the military's seizure of power, the junta banned all the leftist parties that had constituted Allende's UP coalition.
All other parties were placed in "indefinite recess" and were later banned outright. The government's violence was directed not only against dissidents but also against their families and other civilians.

The Rettig Report concluded 2,279 persons who disappeared during the military government were killed for political reasons or as a result of political violence. According to the later Valech Report approximately 31,947 were tortured and 1,312 exiled. The exiles were chased all over the world by the intelligence agencies. In Latin America, this was made in the frame of Operation Condor, a cooperation plan between the various intelligence agencies of South American countries, assisted by a United States CIA communication base in Panama. Pinochet believed these operations were necessary in order to "save the country from communism". In 2011, the commission identified an additional 9,800 victims of political repression during Pinochet's rule, increasing the total number of victims to approximately 40,018, including 3,065 killed.

Some political scientists have ascribed the relative bloodiness of the coup to the stability of the existing democratic system, which required extreme action to overturn. Some of the most infamous cases of human rights violation occurred during the early period: in October 1973, at least 70 people were killed throughout the country by the Caravan of Death. Charles Horman and Frank Teruggi, both US journalists, "disappeared", as did Víctor Olea Alegría, a member of the Socialist Party, and many others, in 1973. British priest Michael Woodward, who vanished within 10 days of the coup, was tortured and beaten to death aboard the Chilean naval ship, "Esmeralda".
Many other important officials of Allende's government were tracked down by the DINA in the frame of Operation Condor. General Carlos Prats, Pinochet's predecessor and army commander under Allende, who had resigned rather than support the moves against Allende's government, was assassinated in Buenos Aires, Argentina, in 1974. A year later, the murder of 119 opponents abroad was disguised as an internal conflict, the DINA setting up a propaganda campaign to support this idea (Operation Colombo), a campaign publicised by the leading newspaper in Chile, El Mercurio.

Other victims of Condor included, among hundreds of less famous persons, Juan José Torres, the former President of Bolivia, assassinated in Buenos Aires on 2 June 1976; Carmelo Soria, a UN diplomat working for the CEPAL, assassinated in July 1976;
Orlando Letelier, a former Chilean ambassador to the United States and minister in Allende's cabinet, assassinated after his release from internment and exile in Washington, D.C. by a car bomb on 21 September 1976. Documents confirm that Pinochet directly ordered the assassination of Letelier. This led to strained relations with the US and to the extradition of Michael Townley, a US citizen who worked for the DINA and had organized Letelier's assassination. Other targeted victims, who escaped assassination, included Christian-Democrat Bernardo Leighton, who escaped an assassination attempt in Rome in 1975 by the Italian terrorist Stefano delle Chiaie; Carlos Altamirano, the leader of the Chilean Socialist Party, targeted for murder in 1975 by Pinochet, along with Volodia Teitelboim, member of the Communist Party; Pascal Allende, the nephew of Salvador Allende and president of the MIR, who escaped an assassination attempt in Costa Rica in March 1976; US Congressman Edward Koch, who became aware in 2001 of relations between death threats and his denunciation of Operation Condor, etc. Furthermore, according to current investigations, Eduardo Frei Montalva, the Christian Democrat President of Chile from 1964 to 1970, may have been poisoned in 1982 by toxin produced by DINA biochemist Eugenio Berrios.

Protests continued, however, during the 1980s, leading to several scandals. In March 1985, the murder of three Communist Party members led to the resignation of César Mendoza, head of the Carabineros and member of the "junta" since its formation. During a 1986 protest against Pinochet, 21-year-old American photographer Rodrigo Rojas DeNegri and 18-year-old student Carmen Gloria Quintana were burnt alive, with only Carmen surviving.

In August 1989, Marcelo Barrios Andres, a 21-year-old member of the FPMR (the armed wing of the PCC, created in 1983, which had attempted to assassinate Pinochet on 7 September 1986), was assassinated by a group of military personnel who were supposed to arrest him on orders of Valparaíso's public prosecutor. However, they simply executed him; this case was included in the Rettig Report. Among the killed and disappeared during the military junta were 440 MIR guerrillas. In December 2015, three former DINA agents were sentenced to ten years in prison for the murder of a 29 year old theology student and activist, German Rodriguez Cortes, in 1978. That same month 62 year old Guillermo Reyes Rammsy, a former Chilean soldier during the Pinochet years, was arrested and charged with murder for boasting of participating in 18 executions during a live phone-in to the Chilean radio show "Chacotero Sentimental."

On June 2, 2017, Chilean judge Hernan Cristoso sentenced 106 former Chilean intelligence officials to between 541 days and 20 years in prison for their role in the kidnapping and murder of 16 left-wing activists in 1974 and 1975.

In 1973, the Chilean economy was deeply depressed for several reasons, including the expropriation of 600 businesses by the Allende government, a tiered exchange rate that distorted markets, protectionism, and the economic sanctions imposed by the Nixon administration, inflation was high (with various accounts between 150% and 1000%), the country had no foreign reserves, and GDP was falling rapidly. By mid-1975, the government set forth an economic policy of free-market reforms that attempted to stop inflation and collapse. Pinochet declared that he wanted "to make Chile not a nation of proletarians, but a nation of proprietors." To formulate the economic rescue, the government relied on the so-called Chicago Boys and a text called "El ladrillo".

Chile's nationalized main copper mines remained in government hands, with the 1980 Constitution later declaring the mines "inalienable". In 1976, Codelco was established to exploit them but new mineral deposits were opened to private investment. In November 1980, the pension system was restructured from a PAYGO-system to a fully funded capitalization system run by private sector pension funds. Healthcare and education were likewise privatized.

Wages decreased by 8%. Family allowances in 1989 were 28% of what they had been in 1970 and the budgets for education, health and housing had dropped by over 20% on average The junta relied on the middle class, the oligarchy, foreign corporations, and foreign loans to maintain itself. Businesses recovered most of their lost industrial and agricultural holdings, for the junta returned properties to original owners who had lost them during expropriations, and sold other industries expropriated by Allende's Popular Unity government to private buyers. This period saw the expansion of business and widespread speculation.

Financial conglomerates became major beneficiaries of the liberalized economy and the flood of foreign bank loans. Large foreign banks reinstated the credit cycle, as debt obligations, such as resuming payment of principal and interest installments, were honored. International lending organizations such as the World Bank, the International Monetary Fund, and the Inter-American Development Bank lent vast sums anew. Many foreign multinational corporations such as International Telephone and Telegraph (ITT), Dow Chemical, and Firestone, all expropriated by Allende, returned to Chile. Pinochet's policies eventually led to substantial GDP growth, in contrast to the negative growth seen in the early years of his administration. Foreign debt also grew substantially under Pinochet, rising 300% between 1974 and 1988.

The Pinochet government implemented an economic model that had three main objectives: economic liberalization, privatization of state owned companies, and stabilization of inflation. In 1985, the government initiated a second round of privatization, revising previously introduced tariff increases and creating a greater supervisory role for the Central Bank. Pinochet's market liberalizations have continued after his death, led by Patricio Aylwin.

Critics argue the neoliberal economic policies of the Pinochet regime resulted in widening inequality and deepening poverty as they negatively impacted the wages, benefits and working conditions of Chile's working class. According to Chilean economist Alejandro Foxley, by the end of Pinochet's reign around 44% of Chilean families were living below the poverty line. According to "The Shock Doctrine" by Naomi Klein, by the late 1980s, the economy had stabilized and was growing, but around 45% of the population had fallen into poverty while the wealthiest 10% saw their incomes rise by 83%.

According to the transitional provisions of the 1980 Constitution, a referendum was scheduled for 5 October 1988, to vote on a new eight-year presidential term for Pinochet. Confronted with increasing opposition, notably at the international level, Pinochet legalized political parties in 1987 and called for a vote to determine whether or not he would remain in power until 1997. If the "YES" won, Pinochet would have to implement the dispositions of the 1980 Constitution, mainly the call for general elections, while he would himself remain in power as President. If the "NO" won, Pinochet would remain President for another year, and a joint Presidential and Parliamentary election would be scheduled.

Another reason for Pinochet's decision to call for elections was the April 1987 visit of Pope John Paul II to Chile. According to the US Catholic author George Weigel, he held a meeting with Pinochet during which they discussed a return to democracy. John Paul II allegedly pushed Pinochet to accept a democratic opening of his government, and even called for his resignation.
Political advertising was legalized on 5 September 1987, as a necessary element for the campaign for the "NO" to the referendum, which countered the official campaign, which presaged a return to a Popular Unity government in case of a defeat of Pinochet. The Opposition, gathered into the "Concertación de Partidos por el NO" ("Coalition of Parties for NO"), organized a colorful and cheerful campaign under the slogan "La alegría ya viene" ("Joy is coming"). It was formed by the Christian Democracy, the Socialist Party and the Radical Party, gathered in the "Alianza Democrática" (Democratic Alliance). In 1988, several more parties, including the Humanist Party, the Ecologist Party, the Social Democrats, and several Socialist Party splinter groups added their support.

On 5 October 1988, the "NO" option won with 55.99% of the votes, against 44.01% of "YES" votes. Pinochet accepted the result and the ensuing Constitutional process led to presidential and legislative elections the following year.

The Coalition changed its name to "Concertación de Partidos por la Democracia" (Coalition of Parties for Democracy) and put forward Patricio Aylwin, a Christian Democrat who had opposed Allende, as presidential candidate, and also proposed a list of candidates for the parliamentary elections. The opposition and the Pinochet government made several negotiations to amend the Constitution and agreed to 54 modifications. These amendments changed the way the Constitution would be modified in the future, added restrictions to state of emergency dispositions, the affirmation of political pluralism, and enhanced constitutional rights as well as the democratic principle and participation to political life. In July 1989, a referendum on the proposed changes took place, supported by all the parties except the right-wing Southern Party and the instrumental Chilean Socialist Party (created by the dictatorship to confuse voters). The Constitutional changes were approved by 91.25% of the voters.

Thereafter, Aylwin won the December 1989 presidential election with 55% of the votes, against less than 30% for the right-wing candidate, Hernán Büchi, who had been Pinochet's Minister of Finances since 1985 (there was also a third-party candidate, Francisco Javier Errázuriz, a wealthy aristocrat representing the extreme economic right, who garnered the remaining 15%). Pinochet thus left the presidency on 11 March 1990 and transferred power to the new democratically elected president.

The "Concertación" also won the majority of votes for the Parliament. However, due to the "binomial" representation system included in the constitution, the elected senators did not achieve a complete majority in Parliament, a situation that would last for over 15 years. This forced them to negotiate all law projects with the Alliance for Chile (originally called "Democracy and Progress" and then "Union for Chile"), a center-right coalition involving the "Unión Demócrata Independiente" (UDI) and "Renovación Nacional" (RN), parties composed mainly of Pinochet's supporters.

Due to the transitional provisions of the constitution, Pinochet remained as Commander-in-Chief of the Army until March 1998. He was then sworn in as a senator-for-life, a privilege granted by the 1980 constitution to former presidents with at least six years in office. His senatorship and consequent immunity from prosecution protected him from legal action. These were possible in Chile only after Pinochet was arrested in 1998 in the United Kingdom, on an extradition request issued by Spanish judge Baltasar Garzón. Allegations of abuses had been made numerous times before his arrest, but never acted upon. The extradition attempt was dramatised in the 2006 BBC television docudrama "Pinochet in Suburbia", with Pinochet played by Derek Jacobi. Shortly before giving up power, Pinochet prohibited all forms of abortion, previously authorized in case of rape or risk to the life of the mother.

Chile was officially neutral during the Falklands War, but Chile's Westinghouse long-range radar that was deployed in the south of the country gave the British task force early warning of Argentinian air attacks. This allowed British ships and troops in the war zone to take defensive action. Margaret Thatcher, the British prime minister at the time of the war, said that the day the radar was taken out of service for overdue maintenance was the day Argentinian fighter-bombers bombed the troopships "Sir Galahad" and "Sir Tristram", leaving 53 dead and many injured. According to Chilean Junta member and former Air Force commander, General Fernando Matthei, Chilean support included military intelligence gathering, radar surveillance, allowing British aircraft to operate with Chilean colours, and facilitating the safe return of British special forces, among other forms of assistance.

In April and May 1982, a squadron of mothballed British Hawker Hunter fighter-bombers departed for Chile, arriving on 22 May and allowing the Chilean Air Force to reform the No. 9 "Las Panteras Negras" Squadron. A further consignment of three frontier surveillance and shipping reconnaissance Canberras left for Chile in October. Some authors have speculated that Argentina might have won the war had the military felt able to employ the elite VIth and VIIIth Mountain Brigades, which remained sitting in the Andes guarding against possible Chilean incursions. Pinochet subsequently visited the UK on more than one occasion. Pinochet's controversial relationship with Thatcher led Labour Prime Minister Tony Blair to mock Thatcher's Conservatives as "the party of Pinochet" in 1999.

Pinochet himself expressed his project in government as a national rebirth inspired in Diego Portales, a figure of the early republic:

The lawyer Jaime Guzmán participated in the design of important speeches of Pinochet, and provided frequent political and doctrinal advice and consultancy.

Jacobo Timerman has called the Chilean army under Pinochet "the last Prussian army in the world", suggesting a pre-Fascist origin to the model of Pinochet's military government.

Historian Alfredo Jocelyn-Holt has referred to Pinochet's figure as "totemic" and added that it is a scapegoat that attracts "all hate". Gabriel Salazar, also a historian, has lamented the lack of an international condemnation of Pinochet in court, since, according to Salazar, that would have damaged his image "irreparably" and that of the judicial system of Chile [for the good] too.

According to Pinochet, who was aware of his ancestry, he was taught the French language by an uncle. He would then have forgotten most of it. Pinochet admired Napoleon as the greatest among French and had a framed picture of him. Another French ruler he admired was Louis XIV.

Pinochets reputation led Peruvians in the 1990s to call Alberto Fujimori "chinochet" instead of his ordinary nickname "chino".
With the rise of the alt-right in the mid-2010s, images of Pinochet have been used in several internet memes. "Pinochet's Free Helicopter Rides", a meme referencing death flights which saw political dissidents being thrown from helicopters over the Pacific or the Andes during Pinochet's rule, has become especially popular.

Pinochet and his government have been characterised as fascist. For example, journalist and author Samuel Chavkin, in his book "Storm Over Chile: The Junta Under Siege", repeatedly characterizes both Pinochet himself and the military dictatorship as fascist.

However, he and his government are generally excluded from academic typologies of fascism. Roger Griffin included Pinochet in a group of pseudo-populist despots distinct from fascism and including the likes of Saddam Hussein, Suharto, and Ferdinand Marcos. He argues that such regimes may be considered populist ultra-nationalism but lack the rhetoric of national rebirth, or palingenesis, necessary to make them conform to the model of palingenetic ultranationalism. Robert Paxton meanwhile compared Pinochet's regime to that of Mobutu Sese Seko in the former Zaire (now Democratic Republic of the Congo), arguing that both were merely client states that lacked popular acclaim and the ability to expand. He further argued that had Pinochet attempted to build true fascism, the regime would likely have been toppled or at least been forced to alter its relationship to the United States. Anna Cento Bull also excluded Pinochet from fascism, although she has argued that his regime belongs to a strand of Cold War anti-communism that was happy to accommodate neo-fascist elements within its activity.

"World Fascism: a Historical Encyclopedia" notes that "Although he was authoritarian and ruled dictatorially, Pinochet's support of neoliberal economic policies and his unwillingness to support national businesses distinguished him from classical fascists."

Historian Gabriel Salazar stated that Pinochet's establishment cult of personality around him was a fascist tactic:
Pinochet was publicly known as a man with a lack of culture. This image was reinforced by the fact that he also portrayed himself as a common man with simple ideas. He was also known for being reserved, sharing little about his opinions or feelings. Before wresting power from Allende, Pinochet had written two books, "Geopolítica" (1968) and "Campaña de Tarapacá" (1972), which established him as a major figure in Chile's military literature. In "Geopolítica" Pinochet plagiarized his mentor general Gregorio Rodríguez Tascón by using paragraphs from a 1949 conference presentation of Rodríguez without attributing them to him.
Rodríguez had previously lectured Pinochet and René Schneider and Carlos Prats in geography and geopolitics. In contrast to the two latter Pinochet was not an outstanding student but his persistence and interest in geopolitics made Rodríguez assume the role as his academic mentor. Rodríguez granted Pinochet a slot as assistant lecturer in geopolitics and in geography. According to Rodríguez Pinochet would have been particularly impressed by his lectures on "The Art of War". Pinochet would later succeed Rodríguez in the geopolitics and geography chair.

Investigative journalist Juan Cristóbal Peña has put forward the thesis that Pinochet felt intellectual envy of Carlos Prats and that the latter's assassination in 1974 was a relief for Pinochet.

During his lifetime, Pinochet amassed more than 55,000 books in his private library, worth an estimated 2,840,000 US dollars (2006–07). The extent of his library was only known to the public after a police inspection in January 2006. Pinochet bought books at several small bookshops in the old centre of Santiago and was later supplied with books from abroad by military attachés who bought texts Pinochet was searching after. As ruler of Chile he used discretionary funds for these purchases. The library included many rare books including a first edition (1646) "Historica relacion del Reyno de Chile" and an original letter of Bernardo O'Higgins. A significant part of the books and documents of the library of José Manuel Balmaceda was found in Pinochet's library in 2006. Pinochet's library contained almost no poetry or fiction works.

Supporters sometimes refer to Pinochet as "mi general" (the military salutation for a general) while opponents call him "pinocho" (Spanish for "Pinocchio", from the children's story). A common nickname used by both younger generations is "el tata" (Chilean Spanish equivalent of "the grandpa"). Since the Riggs Bank scandal he has been referred to sarcastically as "Daniel Lopez", one of the fake identities he used to deposit money in the bank.

The case was a watershed event in judicial history, as it was the first time that a former government head was arrested on the principle of universal jurisdiction.

After having been placed under house arrest in Britain in October 1998 and initiating a judicial and public relations battle, the latter run by Thatcherite political operative Patrick Robertson, he was eventually released in March 2000 on medical grounds by the Home Secretary Jack Straw without facing trial. Straw had overruled a House of Lords decision to extradite Pinochet to face trial in Spain.

Pinochet returned to Chile on 3 March, 2000. His first act when landing in Santiago's airport was to triumphantly get up from his wheelchair to the acclaim of his supporters. He was first greeted by his successor as head of the Chilean armed forces, General Ricardo Izurieta. President-elect Ricardo Lagos said the retired general's televised arrival had damaged the image of Chile, while thousands demonstrated against him.

In March 2000, Congress approved a constitutional amendment creating the status of "ex-president," which granted its holder immunity from prosecution and a financial allowance; this replaced Pinochet's senatorship-for-life. 111 legislators voted for, and 29 against.

The Supreme Court ruled in favor of judge Juan Guzmán's request on August 2000, and Pinochet was indicted on 1 December 2000 for the kidnapping of 75 opponents in the Caravan of Death case. Guzmán advanced the charge of kidnapping as the 75 were officially "disappeared": even though they were all most likely dead, the absence of their corpses made any charge of "homicide" difficult.

However, in July 2002, the Supreme Court dismissed Pinochet's indictment in the various human rights abuse cases, for medical reasons (vascular dementia). The debate concerned Pinochet's mental faculties, his legal team claiming that he was senile and could not remember, while others (including several physicians) claimed that he was only affected physically but retained all control of his faculties. The same year, the prosecuting attorney Hugo Guttierez, in charge of the Caravan of Death case, declared, "Our country has the degree of justice that the political transition permits us to have."

Pinochet resigned from his senatorial seat shortly after the Supreme Court's July 2002 ruling. In May 2004, the Supreme Court overturned its precedent decision, and ruled that he was capable of standing trial. In arguing their case, the prosecution presented a recent TV interview Pinochet had given for a Miami-based television network, which raised doubts about his alleged mental incapacity. In December 2004, he was charged with several crimes, including the 1974 assassination of General Prats and the Operation Colombo case in which 119 died, and was again placed under house arrest. He suffered a stroke on 18 December 2004. Questioned by his judges in order to know if, as President, he was the direct head of DINA, he answered: "I don't remember, but it's not true. And if it were true, I don't remember."

In January 2005, the Chilean Army accepted institutional responsibility for past human rights abuses. In 2006, Pinochet was indicted for kidnappings and torture at the Villa Grimaldi detention center by judge Alejandro Madrid (Guzmán's successor), as well as for the 1995 assassination of the DINA biochemist Eugenio Berrios, himself involved in the Letelier case. Berrios, who had worked with Michael Townley, had produced sarin gas, anthrax and botulism in the Bacteriological War Army Laboratory for Pinochet; these materials were used against political opponents. The DINA biochemist was also alleged to have created black cocaine, which Pinochet then sold in Europe and the United States. The money for the drug trade was allegedly deposited into Pinochet's bank accounts. Pinochet's son Marco Antonio, who had been accused of participating in the drug trade, in 2006 denied claims of drug trafficking in his father's administration and said that he would sue Manuel Contreras, who had said that Pinochet sold cocaine.

On 25 November 2006, Pinochet marked his 91st birthday by having his wife read a statement he had written to admirers present for his birthday: "I assume the political responsibility for all that has been done." Two days later, he was again sentenced to house arrest for the kidnapping and murder of two bodyguards of Salvador Allende who were arrested the day of the 1973 coup and executed by firing squad during the Caravan of Death.

However, Pinochet died a few days later, on 10 December 2006, without having been convicted of any of the crimes of which he was accused.

In 2004, a United States Senate money laundering investigation led by Senators Carl Levin (D-MI) and Norm Coleman (R-MN)—ordered in the wake of the 11 September 2001 attacks—uncovered a network of over 125 securities and bank accounts at Riggs Bank and other U.S. financial institutions used by Pinochet and his associates for twenty-five years to secretly move millions of dollars.
Though the subcommittee was charged only with investigating compliance of financial institutions under the USA PATRIOT Act, and not the Pinochet regime, Senator Coleman noted:
Over several months in 2005, Chilean judge Sergio Muñoz indicted Augusto Pinochet's wife, Lucia Hiriart; four of his children – Marco Antonio, Jacqueline, Veronica and Lucia Pinochet; his personal secretary, Monica Ananias; and his former aide Oscar Aitken on tax evasion and falsification charges stemming from the Riggs Bank investigation. In January 2006, daughter Lucia Pinochet was detained at Washington DC-Dulles airport and subsequently deported while attempting to evade the tax charges in Chile. In January 2007, the Santiago Court of Appeals revoked most of the indictment from Judge Carlos Cerda against the Pinochet family. But Pinochet's five children, his wife and 17 other persons (including two generals, one of his former lawyer and former secretary) were arrested in October 2007 on charges of embezzlement and use of false passports. They are accused of having illegally transferred $27m (£13.2m) to foreign bank accounts during Pinochet's rule.

In September 2005, a joint investigation by "The Guardian" and "La Tercera" revealed that the British arms firm BAE Systems had been identified as paying more than £1m to Pinochet, through a front company in the British Virgin Islands, which BAE has used to channel commission on arms deals. The payments began in 1997 and lasted until 2004.

Furthermore, in 2007, fifteen years of investigation led to the conclusion that the 1992 assassination of DINA Colonel Gerardo Huber was most probably related to various illegal arms traffic carried out, after Pinochet's resignation from power, by military circles very close to himself. Huber had been assassinated a short time before he was due to testify in the case concerning the 1991 illegal export of weapons to Croatian army. The deal involved 370 tons of weapons, sold to Croatia by Chile on 7 December 1991, when the former country was under a United Nations' embargo because of the support for Croatia war in Yugoslavia. In January 1992, the judge Hernán Correa de la Cerda wanted to hear Gerardo Huber in this case, but the latter may have been silenced to avoid implicating Pinochet in this new case—although the latter was not anymore President, he remained at the time Commander-in-Chief of the Army. Pinochet was at the center of this illegal arms trade, receiving money through various offshores and front companies, including the Banco Coutts International in Miami.

Pinochet was stripped of his parliamentary immunity in August 2000 by the Supreme Court, and indicted by judge Juan Guzmán Tapia. Guzmán had ordered in 1999 the arrest of five militarists, including General Pedro Espinoza Bravo of the DINA, for their role in the Caravan of Death following the coup on 11 September. Arguing that the bodies of the "disappeared" were still missing, he made jurisprudence, which had as effect to lift any prescription on the crimes committed by the military. Pinochet's trial continued until his death on 10 December 2006, with an alternation of indictments for specific cases, lifting of immunities by the Supreme Court or to the contrary immunity from prosecution, with his health a main argument for, or against, his prosecution.

The Supreme Court affirmed, in March 2005, Pinochet's immunity concerning the 1974 assassination of General Carlos Prats in Buenos Aires, which had taken place in the frame of Operation Condor. However, he was deemed fit to stand trial for Operation Colombo, during which 119 political opponents were "disappeared" in Argentina. The Chilean justice also lifted his immunity on the Villa Grimaldi case, a detention and torture center in the outskirts of Santiago. Pinochet, who still benefited from a reputation of righteousness from his supporters, lost legitimacy when he was put under house arrest on tax fraud and passport forgery, following the publication by the US Senate Permanent Subcommittee on Investigations of a report concerning the Riggs Bank in July 2004. The report was a consequence of investigations on financial funding of the 11 September 2001 attacks in the US. The bank controlled between US$4 million and $8 million of Pinochet's assets, who lived in Santiago in a modest house, dissimulating his wealth. According to the report, Riggs participated in money laundering for Pinochet, setting up offshore shell corporations (referring to Pinochet as only "a former public official"), and hiding his accounts from regulatory agencies. Related to Pinochet's and his family secret bank accounts in United States and in Caribbean islands, this tax fraud filing for an amount of 27 million dollars shocked the conservative sectors who still supported him. Ninety percent of these funds would have been raised between 1990 and 1998, when Pinochet was chief of the Chilean armies, and would essentially have come from weapons traffic (when purchasing French 'Mirage' fighter aircraft in 1994, Dutch 'Leopard 2' tanks, Swiss 'MOWAG' armored vehicles or by illegal sales of weapons to Croatia, during the Balkans war.) His wife, Lucía Hiriart, and his son, Marco Antonio Pinochet, were also sued for complicity. For the fourth time in seven years, Pinochet was indicted by the Chilean justice.

Pinochet suffered a heart attack on the morning of 3 December 2006, and subsequently the same day he was given the last rites. On 4 December 2006, the Chilean Court of Appeals ordered the suspension of his house arrest. On 10 December 2006 at 13:30 local time (16:30 UTC) he was taken to the intensive care unit. He died of congestive heart failure and pulmonary edema, surrounded by family members, at the Military Hospital at 14:15 local time (17:15 UTC).

Massive spontaneous street demonstrations broke out throughout the country upon the news of his death. In Santiago, opponents celebrated his death in Alameda Avenue, while supporters grieved outside the Military Hospital. Pinochet's remains lay in repose on 11 December 2006 at the Military Academy in Las Condes. During this ceremony, Francisco Cuadrado Prats—the grandson of Carlos Prats (a former Commander-in-Chief of the Army in the Allende government who was murdered by Pinochet's secret police)—spat on the coffin, and was quickly surrounded by supporters of Pinochet, who kicked and insulted him. Pinochet's funeral took place the following day at the same venue before a gathering of 60,000 supporters.

In a government decision, he was not granted a state funeral (an honor normally bestowed upon past presidents of Chile) but a military funeral as former commander-in-chief of the Army appointed by Allende. The government also refused to declare an official national day of mourning, but it did authorize flags at military barracks to be flown at half staff, and for the Chilean flag to be draped on Pinochet's coffin. Socialist President Michelle Bachelet, whose father Alberto was temporarily imprisoned and tortured after the 1973 coup and died shortly afterwards from heart complications, said that it would be "a violation of [her] conscience" to attend a state funeral for Pinochet. The only government authority present at the public funeral was the Defense Minister, Vivianne Blanlot.

In Spain, supporters of late dictator Francisco Franco paid homage to Pinochet. Antonio Tejero, who led the failed coup of 1981, attended a memorial service in Madrid.
Pinochet's body was cremated in Parque del Mar Cemetery, Concón on 12 December 2006, on his request to "avoid vandalism of his tomb," according to his son Marco Antonio. His ashes were delivered to his family later that day, and are deposited in Los Boldos, Santo Domingo, Valparaiso, Chile; one of his personal residences. The armed forces refused to allow his ashes to be deposited on military property.

Pinochet's regime was responsible for various human rights abuses during its reign, including forced disappearances, murder and torture of political opponents. According to a government commission report that included testimony from more than 30,000 people, Pinochet's government killed at least 3,197 people and tortured about 29,000. Two-thirds of the cases listed in the report happened in 1973.
Professor Clive Foss, in "The Tyrants: 2500 Years of Absolute Power and Corruption" (Quercus Publishing 2006), estimates that 1,500–2,000 Chileans were killed or "disappeared" during the Pinochet regime. In October 1979, "The New York Times" reported that Amnesty International had documented the disappearance of approximately 1,500 Chileans since 1973. Among the killed and disappeared during the military regime were at least 663 Marxist MIR guerrillas. The Manuel Rodríguez Patriotic Front, however, has stated that only 49 FPMR guerrillas were killed but hundreds detained and tortured. According to a study in Latin American Perspectives, at least 200,000 Chileans (about 2% of Chile's 1973 population) were forced to go into exile. Additionally, hundreds of thousands left the country in the wake of the economic crises that followed the military coup during the 1970s and 1980s. Some of the key individuals who fled because of political persecution were followed in their exile by the DINA secret police, in the framework of Operation "Condor", which linked South American military dictatorships together against political opponents.

According to John Dinges, author of "The Condor Years (The New Press 2003)", documents released in 2015 revealed a CIA report dated April 28, 1978 that showed the agency by then had knowledge that Pinochet ordered the assassination of Orlando Letelier, a leading political opponent living in exile in the United States.

According to Peter Kornbluh in "The Pinochet File", "routine sadism was taken to extremes" in the prison camps. The rape of women was common, including sexual torture such as the insertion of rats into genitals and "unnatural acts involving dogs." Detainees were forcibly immersed in vats of urine and excrement, and were occasionally forced to ingest it. Beatings with gun butts, fists and chains were routine; one technique known as "the telephone" involved the torturer slamming "his open hands hard and rhythmically against the ears of the victim," leaving the person deaf. At Villa Grimaldi, prisoners were dragged into the parking lot and had the bones in their legs crushed as they were run over with trucks. Some died from torture; prisoners were beaten with chains and left to die from internal injuries. Following abuse and execution, corpses were interred in secret graves, dropped into rivers or the ocean, or just dumped on urban streets in the night. The body of the renowned Chilean singer, theatre director and academic Víctor Jara was found in a dirty canal "with his hands and face extremely disfigured" and with "forty-four bullet holes."

The practice of murdering political opponents via "death flights", employed by the juntas of Argentina and Chile, has been the subject of numerous alt-right internet memes, with the suggestion that political enemies and leftists be given "free helicopter rides." In 2001, Chilean President Ricardo Lagos informed the nation that during Pinochet's reign, 120 bodies had been tossed from helicopters into "the ocean, the lakes and the rivers of Chile".


How much oxygen is present in blood?

Oxygen saturation is the fraction of oxygen-saturated hemoglobin relative to total hemoglobin (unsaturated + saturated) in the blood. The human body requires and regulates a very precise and specific balance of oxygen in the blood. Normal blood oxygen levels in humans are considered 95–100 percent. If the level is below 90 percent, it is considered low resulting in hypoxemia. Blood oxygen levels below 80 percent may compromise organ function, such as the brain and heart, and should be promptly addressed. Continued low oxygen levels may lead to respiratory or cardiac arrest. Oxygen therapy may be used to assist in raising blood oxygen levels. Oxygenation occurs when oxygen molecules () enter the tissues of the body. For example, blood is oxygenated in the lungs, where oxygen molecules travel from the air and into the blood. Oxygenation is commonly used to refer to medical oxygen saturation.

Oxygen saturation (medicine)

In medicine, oxygen saturation, commonly referred to as "sats", measures the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. At low partial pressures of oxygen, most hemoglobin is deoxygenated. At around 90% (the value varies according to the clinical context) oxygen saturation increases according to an oxygen-hemoglobin dissociation curve and approaches 100% at partial oxygen pressures of >10 kPa. A pulse oximeter relies on the light absorption characteristics of saturated hemoglobin to give an indication of oxygen saturation.

The body maintains a stable level of oxygen saturation for the most part by chemical processes of aerobic metabolism associated with breathing. Using the respiratory system, red blood cells, specifically the hemoglobin, gather oxygen in the lungs and distribute it to the rest of the body. The needs of the body's blood oxygen may fluctuate such as during exercise when more oxygen is required or when living at higher altitudes. A blood cell is said to be "saturated" when carrying a normal amount of oxygen. Both too high and too low levels can have adverse effects on the body.

An SaO (arterial oxygen saturation, as determined by an arterial blood gas test) value below 60% causes hypoxemia (which can also be caused by anemia). Hypoxemia due to low SaO is indicated by cyanosis. Oxygen saturation can be measured in different tissues:

About 98.5% of the oxygen in a sample of arterial blood in a healthy human breathing air at sea-level pressure is chemically combined with the hemoglobin. About 1.5% is physically dissolved in the other blood liquids and not connected to hemoglobin. The hemoglobin molecule is the primary transporter of oxygen in mammals and many other species (for exceptions, see below). Hemoglobin has an oxygen binding capacity between 1.36 and 1.40 ml O per gram hemoglobin, which increases the total blood oxygen capacity seventyfold, compared to if oxygen solely were carried by its solubility of 0.03 ml O per liter blood per mm Hg partial pressure of oxygen (about 100 mm Hg in arteries).

Blood

Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

In vertebrates, it is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), and contains proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves. Albumin is the main protein in plasma, and it functions to regulate the colloidal osmotic pressure of blood. The blood cells are mainly red blood cells (also called RBCs or erythrocytes), white blood cells (also called WBCs or leukocytes) and platelets (also called thrombocytes). The most abundant cells in vertebrate blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates oxygen transport by reversibly binding to this respiratory gas and greatly increasing its solubility in blood. In contrast, carbon dioxide is mostly transported extracellularly as bicarbonate ion transported in plasma.

Vertebrate blood is bright red when its hemoglobin is oxygenated and dark red when it is deoxygenated. Some animals, such as crustaceans and mollusks, use hemocyanin to carry oxygen, instead of hemoglobin. Insects and some mollusks use a fluid called hemolymph instead of blood, the difference being that hemolymph is not contained in a closed circulatory system. In most insects, this "blood" does not contain oxygen-carrying molecules such as hemoglobin because their bodies are small enough for their tracheal system to suffice for supplying oxygen.

Jawed vertebrates have an adaptive immune system, based largely on white blood cells. White blood cells help to resist infections and parasites. Platelets are important in the clotting of blood. Arthropods, using hemolymph, have hemocytes as part of their immune system.

Blood is circulated around the body through blood vessels by the pumping action of the heart. In animals with lungs, arterial blood carries oxygen from inhaled air to the tissues of the body, and venous blood carries carbon dioxide, a waste product of metabolism produced by cells, from the tissues to the lungs to be exhaled.

Medical terms related to blood often begin with hemo- or hemato- (also spelled haemo- and haemato-) from the Greek word ("haima") for "blood". In terms of anatomy and histology, blood is considered a specialized form of connective tissue, given its origin in the bones and the presence of potential molecular fibers in the form of fibrinogen.

Blood performs many important functions within the body, including:

Blood accounts for 7% of the human body weight, with an average density around 1060 kg/m, very close to pure water's density of 1000 kg/m. The average adult has a blood volume of roughly, which is composed of plasma and several kinds of cells. These blood cells (which are also called corpuscles or "formed elements") consist of erythrocytes (red blood cells, RBCs), leukocytes (white blood cells), and thrombocytes (platelets). By volume, the red blood cells constitute about 45% of whole blood, the plasma about 54.3%, and white cells about 0.7%.

Whole blood (plasma and cells) exhibits non-Newtonian fluid dynamics. If all human hemoglobin were free in the plasma rather than being contained in RBCs, the circulatory fluid would be too viscous for the cardiovascular system to function effectively.

One microliter of blood contains:

About 55% of blood is blood plasma, a fluid that is the blood's liquid medium, which by itself is straw-yellow in color. The blood plasma volume totals of 2.7–3.0 liters (2.8–3.2 quarts) in an average human. It is essentially an aqueous solution containing 92% water, 8% blood plasma proteins, and trace amounts of other materials. Plasma circulates dissolved nutrients, such as glucose, amino acids, and fatty acids (dissolved in the blood or bound to plasma proteins), and removes waste products, such as carbon dioxide, urea, and lactic acid.

Other important components include:

The term serum refers to plasma from which the clotting proteins have been removed. Most of the proteins remaining are albumin and immunoglobulins.

Blood pH is regulated to stay within the narrow range of 7.35 to 7.45, making it slightly basic. Blood that has a pH below 7.35 is too acidic, whereas blood pH above 7.45 is too basic. Blood pH, partial pressure of oxygen (pO), partial pressure of carbon dioxide (pCO), and bicarbonate (HCO) are carefully regulated by a number of homeostatic mechanisms, which exert their influence principally through the respiratory system and the urinary system to control the acid-base balance and respiration. An arterial blood gas test measures these. Plasma also circulates hormones transmitting their messages to various tissues. The list of normal reference ranges for various blood electrolytes is extensive.

Human blood is typical of that of mammals, although the precise details concerning cell numbers, size, protein structure, and so on, vary somewhat between species. In non-mammalian vertebrates, however, there are some key differences:

Blood is circulated around the body through blood vessels by the pumping action of the heart. In humans, blood is pumped from the strong left ventricle of the heart through arteries to peripheral tissues and returns to the right atrium of the heart through veins. It then enters the right ventricle and is pumped through the pulmonary artery to the lungs and returns to the left atrium through the pulmonary veins. Blood then enters the left ventricle to be circulated again. Arterial blood carries oxygen from inhaled air to all of the cells of the body, and venous blood carries carbon dioxide, a waste product of metabolism by cells, to the lungs to be exhaled. However, one exception includes pulmonary arteries, which contain the most deoxygenated blood in the body, while the pulmonary veins contain oxygenated blood.

Additional return flow may be generated by the movement of skeletal muscles, which can compress veins and push blood through the valves in veins toward the right atrium.

The blood circulation was famously described by William Harvey in 1628.

In vertebrates, the various cells of blood are made in the bone marrow in a process called hematopoiesis, which includes erythropoiesis, the production of red blood cells; and myelopoiesis, the production of white blood cells and platelets. During childhood, almost every human bone produces red blood cells; as adults, red blood cell production is limited to the larger bones: the bodies of the vertebrae, the breastbone (sternum), the ribcage, the pelvic bones, and the bones of the upper arms and legs. In addition, during childhood, the thymus gland, found in the mediastinum, is an important source of T lymphocytes.
The proteinaceous component of blood (including clotting proteins) is produced predominantly by the liver, while hormones are produced by the endocrine glands and the watery fraction is regulated by the hypothalamus and maintained by the kidney.

Healthy erythrocytes have a plasma life of about 120 days before they are degraded by the spleen, and the Kupffer cells in the liver. The liver also clears some proteins, lipids, and amino acids. The kidney actively secretes waste products into the urine.

With the exception of pulmonary and umbilical arteries and their corresponding veins, arteries carry oxygenated blood away from the heart and deliver it to the body via arterioles and capillaries, where the oxygen is consumed; afterwards, venules and veins carry deoxygenated blood back to the heart.

Under normal conditions in adult humans at rest, hemoglobin in blood leaving the lungs is about 98–99% saturated with oxygen, achieving an oxygen delivery between 950 and 1150 ml/min to the body. In a healthy adult at rest, oxygen consumption is approximately 200–250 ml/min, and deoxygenated blood returning to the lungs is still roughly 75% (70 to 78%) saturated. Increased oxygen consumption during sustained exercise reduces the oxygen saturation of venous blood, which can reach less than 15% in a trained athlete; although breathing rate and blood flow increase to compensate, oxygen saturation in arterial blood can drop to 95% or less under these conditions. Oxygen saturation this low is considered dangerous in an individual at rest (for instance, during surgery under anesthesia). Sustained hypoxia (oxygenation less than 90%), is dangerous to health, and severe hypoxia (saturations less than 30%) may be rapidly fatal.

A fetus, receiving oxygen via the placenta, is exposed to much lower oxygen pressures (about 21% of the level found in an adult's lungs), so fetuses produce another form of hemoglobin with a much higher affinity for oxygen (hemoglobin F) to function under these conditions.

CO is carried in blood in three different ways. (The exact percentages vary depending whether it is arterial or venous blood). Most of it (about 70%) is converted to bicarbonate ions by the enzyme carbonic anhydrase in the red blood cells by the reaction CO + HO → HCO → H + ; about 7% is dissolved in the plasma; and about 23% is bound to hemoglobin as carbamino compounds.

Hemoglobin, the main oxygen-carrying molecule in red blood cells, carries both oxygen and carbon dioxide. However, the CO bound to hemoglobin does not bind to the same site as oxygen. Instead, it combines with the N-terminal groups on the four globin chains. However, because of allosteric effects on the hemoglobin molecule, the binding of CO decreases the amount of oxygen that is bound for a given partial pressure of oxygen. The decreased binding to carbon dioxide in the blood due to increased oxygen levels is known as the Haldane effect, and is important in the transport of carbon dioxide from the tissues to the lungs. A rise in the partial pressure of CO or a lower pH will cause offloading of oxygen from hemoglobin, which is known as the Bohr effect.

Some oxyhemoglobin loses oxygen and becomes deoxyhemoglobin. Deoxyhemoglobin binds most of the hydrogen ions as it has a much greater affinity for more hydrogen than does oxyhemoglobin.

In mammals, blood is in equilibrium with lymph, which is continuously formed in tissues from blood by capillary ultrafiltration. Lymph is collected by a system of small lymphatic vessels and directed to the thoracic duct, which drains into the left subclavian vein where lymph rejoins the systemic blood circulation.

Blood circulation transports heat throughout the body, and adjustments to this flow are an important part of thermoregulation. Increasing blood flow to the surface (e.g., during warm weather or strenuous exercise) causes warmer skin, resulting in faster heat loss. In contrast, when the external temperature is low, blood flow to the extremities and surface of the skin is reduced and to prevent heat loss and is circulated to the important organs of the body, preferentially.

Rate of blood flow varies greatly between different organs. Liver has the most abundant blood supply with an approximate flow of 1350 ml/min. Kidney and brain are the second and the third most supplied organs, with 1100 ml/min and ~700 ml/min, respectively.

Relative rates of blood flow per 100 g of tissue are different, with kidney, adrenal gland and thyroid being the first, second and third most supplied tissues, respectively.

The restriction of blood flow can also be used in specialized tissues to cause engorgement, resulting in an erection of that tissue; examples are the erectile tissue in the penis and clitoris.

Another example of a hydraulic function is the jumping spider, in which blood forced into the legs under pressure causes them to straighten for a powerful jump, without the need for bulky muscular legs.

In insects, the blood (more properly called hemolymph) is not involved in the transport of oxygen. (Openings called tracheae allow oxygen from the air to diffuse directly to the tissues.) Insect blood moves nutrients to the tissues and removes waste products in an open system.

Other invertebrates use respiratory proteins to increase the oxygen-carrying capacity. Hemoglobin is the most common respiratory protein found in nature. Hemocyanin (blue) contains copper and is found in crustaceans and mollusks. It is thought that tunicates (sea squirts) might use vanabins (proteins containing vanadium) for respiratory pigment (bright-green, blue, or orange).

In many invertebrates, these oxygen-carrying proteins are freely soluble in the blood; in vertebrates they are contained in specialized red blood cells, allowing for a higher concentration of respiratory pigments without increasing viscosity or damaging blood filtering organs like the kidneys.

Giant tube worms have unusual hemoglobins that allow them to live in extraordinary environments. These hemoglobins also carry sulfides normally fatal in other animals.

The coloring matter of blood (hemochrome) is largely due to the protein in the blood responsible for oxygen transport. Different groups of organisms use different proteins.

Hemoglobin is the principal determinant of the color of blood in vertebrates. Each molecule has four heme groups, and their interaction with various molecules alters the exact color. In vertebrates and other hemoglobin-using creatures, arterial blood and capillary blood are bright red, as oxygen imparts a strong red color to the heme group. Deoxygenated blood is a darker shade of red; this is present in veins, and can be seen during blood donation and when venous blood samples are taken. This is because the spectrum of light absorbed by hemoglobin differs between the oxygenated and deoxygenated states.

Blood in carbon monoxide poisoning is bright red, because carbon monoxide causes the formation of carboxyhemoglobin. In cyanide poisoning, the body cannot utilize oxygen, so the venous blood remains oxygenated, increasing the redness. There are some conditions affecting the heme groups present in hemoglobin that can make the skin appear blue – a symptom called cyanosis. If the heme is oxidized, methemoglobin, which is more brownish and cannot transport oxygen, is formed. In the rare condition sulfhemoglobinemia, arterial hemoglobin is partially oxygenated, and appears dark red with a bluish hue.

Veins close to the surface of the skin appear blue for a variety of reasons. However, the factors that contribute to this alteration of color perception are related to the light-scattering properties of the skin and the processing of visual input by the visual cortex, rather than the actual color of the venous blood.

Skinks in the genus "Prasinohaema" have green blood due to a buildup of the waste product biliverdin.

The blood of most mollusks – including cephalopods and gastropods – as well as some arthropods, such as horseshoe crabs, is blue, as it contains the copper-containing protein hemocyanin at concentrations of about 50 grams per liter. Hemocyanin is colorless when deoxygenated and dark blue when oxygenated. The blood in the circulation of these creatures, which generally live in cold environments with low oxygen tensions, is grey-white to pale yellow, and it turns dark blue when exposed to the oxygen in the air, as seen when they bleed. This is due to change in color of hemocyanin when it is oxidized. Hemocyanin carries oxygen in extracellular fluid, which is in contrast to the intracellular oxygen transport in mammals by hemoglobin in RBCs.

The blood of most annelid worms and some marine polychaetes use chlorocruorin to transport oxygen. It is green in color in dilute solutions.

Hemerythrin is used for oxygen transport in the marine invertebrates sipunculids, priapulids, brachiopods, and the annelid worm, magelona. Hemerythrin is violet-pink when oxygenated.

The blood of some species of ascidians and tunicates, also known as sea squirts, contains proteins called vanadins. These proteins are based on vanadium, and give the creatures a concentration of vanadium in their bodies 100 times higher than the surrounding sea water. Unlike hemocyanin and hemoglobin, hemovanadin is not an oxygen carrier. When exposed to oxygen, however, vanadins turn a mustard yellow.
Substances other than oxygen can bind to hemoglobin; in some cases this can cause irreversible damage to the body. Carbon monoxide, for example, is extremely dangerous when carried to the blood via the lungs by inhalation, because carbon monoxide irreversibly binds to hemoglobin to form carboxyhemoglobin, so that less hemoglobin is free to bind oxygen, and fewer oxygen molecules can be transported throughout the blood. This can cause suffocation insidiously. A fire burning in an enclosed room with poor ventilation presents a very dangerous hazard, since it can create a build-up of carbon monoxide in the air. Some carbon monoxide binds to hemoglobin when smoking tobacco.

Blood for transfusion is obtained from human donors by blood donation and stored in a blood bank. There are many different blood types in humans, the ABO blood group system, and the Rhesus blood group system being the most important. Transfusion of blood of an incompatible blood group may cause severe, often fatal, complications, so crossmatching is done to ensure that a compatible blood product is transfused.

Other blood products administered intravenously are platelets, blood plasma, cryoprecipitate, and specific coagulation factor concentrates.

Many forms of medication (from antibiotics to chemotherapy) are administered intravenously, as they are not readily or adequately absorbed by the digestive tract.

After severe acute blood loss, liquid preparations, generically known as plasma expanders, can be given intravenously, either solutions of salts (NaCl, KCl, CaCl etc.) at physiological concentrations, or colloidal solutions, such as dextrans, human serum albumin, or fresh frozen plasma. In these emergency situations, a plasma expander is a more effective life-saving procedure than a blood transfusion, because the metabolism of transfused red blood cells does not restart immediately after a transfusion.

In modern evidence-based medicine, bloodletting is used in management of a few rare diseases, including hemochromatosis and polycythemia. However, bloodletting and leeching were common unvalidated interventions used until the 19th century, as many diseases were incorrectly thought to be due to an excess of blood, according to Hippocratic medicine.

According to the "Oxford English Dictionary", the word "blood" dates to the oldest English, circa 1000 CE. The word is derived from Middle English, which is derived from the Old English word "blōd", which is akin to the Old High German word "bluot", meaning blood. The modern German word is "(das) Blut."

Fåhræus (a Swedish physician who devised the erythrocyte sedimentation rate) suggested that the Ancient Greek system of humorism, wherein the body was thought to contain four distinct bodily fluids (associated with different temperaments), were based upon the observation of blood clotting in a transparent container. When blood is drawn in a glass container and left undisturbed for about an hour, four different layers can be seen. A dark clot forms at the bottom (the "black bile"). Above the clot is a layer of red blood cells (the "blood"). Above this is a whitish layer of white blood cells (the "phlegm"). The top layer is clear yellow serum (the "yellow bile").

The ABO blood group system was discovered in the year 1900 by Karl Landsteiner. Jan Janský is credited with the first classification of blood into the four types (A, B, AB, and O) in 1907, which remains in use today. In 1907 the first blood transfusion was performed that used the ABO system to predict compatibility. The first non-direct transfusion was performed on March 27, 1914. The Rhesus factor was discovered in 1937.

Due to its importance to life, blood is associated with a large number of beliefs. One of the most basic is the use of blood as a symbol for family relationships through birth/parentage; to be "related by blood" is to be related by ancestry or descendence, rather than marriage. This bears closely to bloodlines, and sayings such as "blood is thicker than water" and "bad blood", as well as "Blood brother".

Blood is given particular emphasis in the Jewish and Christian religions, because Leviticus 17:11 says "the life of a creature is in the blood." This phrase is part of the Levitical law forbidding the drinking of blood or eating meat with the blood still intact instead of being poured off.

Mythic references to blood can sometimes be connected to the life-giving nature of blood, seen in such events as childbirth, as contrasted with the blood of injury or death.

In many indigenous Australian Aboriginal peoples' traditions, ochre (particularly red) and blood, both high in iron content and considered Maban, are applied to the bodies of dancers for ritual. As Lawlor states:
In many Aboriginal rituals and ceremonies, red ochre is rubbed all over the naked bodies of the dancers. In secret, sacred male ceremonies, blood extracted from the veins of the participant's arms is exchanged and rubbed on their bodies. Red ochre is used in similar ways in less-secret ceremonies. Blood is also used to fasten the feathers of birds onto people's bodies. Bird feathers contain a protein that is highly magnetically sensitive. Lawlor comments that blood employed in this fashion is held by these peoples to attune the dancers to the invisible energetic realm of the Dreamtime. Lawlor then connects these invisible energetic realms and magnetic fields, because iron is magnetic.

Among the Germanic tribes, blood was used during their sacrifices; the "Blóts". The blood was considered to have the power of its originator, and, after the butchering, the blood was sprinkled on the walls, on the statues of the gods, and on the participants themselves. This act of sprinkling blood was called "blóedsian" in Old English, and the terminology was borrowed by the Roman Catholic Church becoming "to bless" and "blessing". The Hittite word for blood, "ishar" was a cognate to words for "oath" and "bond", see Ishara.
The Ancient Greeks believed that the blood of the gods, "ichor", was a substance that was poisonous to mortals.

As a relic of Germanic Law, the cruentation, an ordeal where the corpse of the victim was supposed to start bleeding in the presence of the murderer, was used until the early 17th century.

In Genesis 9:4, God prohibited Noah and his sons from eating blood (see Noahide Law). This command continued to be observed by the Eastern Orthodox.

It is also found in the Bible that when the Angel of Death came around to the Hebrew house that the first-born child would not die if the angel saw lamb's blood wiped across the doorway.

At the Council of Jerusalem, the apostles prohibited certain Christians from consuming blood – this is documented in Acts 15:20 and 29. This chapter specifies a reason (especially in verses 19–21): It was to avoid offending Jews who had become Christians, because the Mosaic Law Code prohibited the practice.

Christ's blood is the means for the atonement of sins. Also, ″… the blood of Jesus Christ his [God] Son cleanseth us from all sin." (1 John 1:7), “… Unto him [God] that loved us, and washed us from our sins in his own blood." (Revelation 1:5), and "And they overcame him (Satan) by the blood
of the Lamb [Jesus the Christ], and by the word of their testimony …” (Revelation 12:11).

Some Christian churches, including Roman Catholicism, Eastern Orthodoxy, Oriental Orthodoxy, and the Assyrian Church of the East teach that, when consecrated, the Eucharistic wine actually becomes the blood of Jesus for worshippers to drink. Thus in the consecrated wine, Jesus becomes spiritually and physically present. This teaching is rooted in the Last Supper, as written in the four gospels of the Bible, in which Jesus stated to his disciples that the bread that they ate was his body, and the wine was his blood. ""This cup is the new testament in my blood, which is shed for you." ()".

Most forms of Protestantism, especially those of a Wesleyan or Presbyterian lineage, teach that the wine is no more than a symbol of the blood of Christ, who is spiritually but not physically present. Lutheran theology teaches that the body and blood is present together "in, with, and under" the bread and wine of the Eucharistic feast.

In Judaism, animal blood may not be consumed even in the smallest quantity (Leviticus 3:17 and elsewhere); this is reflected in Jewish dietary laws (Kashrut). Blood is purged from meat by rinsing and soaking in water (to loosen clots), salting and then rinsing with water again several times. Eggs must also be checked and any blood spots removed before consumption. Although blood from fish is biblically kosher, it is rabbinically forbidden to consume fish blood to avoid the appearance of breaking the Biblical prohibition.

Another ritual involving blood involves the covering of the blood of fowl and game after slaughtering (Leviticus 17:13); the reason given by the Torah is: "Because the life of the animal is [in] its blood" (ibid 17:14). In relation to human beings, Kabbalah expounds on this verse that the animal soul of a person is in the blood, and that physical desires stem from it.

Likewise, the mystical reason for salting temple sacrifices and slaughtered meat is to remove the blood of animal-like passions from the person. By removing the animal's blood, the animal energies and life-force contained in the blood are removed, making the meat fit for human consumption.

Consumption of food containing blood is forbidden by Islamic dietary laws. This is derived from the statement in the Qur'an, sura Al-Ma'ida (5:3): "Forbidden to you (for food) are: dead meat, blood, the flesh of swine, and that on which has been invoked the name of other than Allah."

Blood is considered unclean, hence there are specific methods to obtain physical and ritual status of cleanliness once bleeding has occurred. Specific rules and prohibitions apply to menstruation, postnatal bleeding and irregular vaginal bleeding. When an animal has been slaughtered, the animal's neck is cut in a way to ensure that the spine is not severed, hence the brain may send commands to the heart to pump blood to it for oxygen. In this way, blood is removed from the body, and the meat is generally now safe to cook and eat. In modern times, blood transfusions are generally not considered against the rules.

Based on their interpretation of scriptures such as Acts 15:28, 29 ("Keep abstaining...from blood."), many Jehovah's Witnesses neither consume blood nor accept transfusions of whole blood or its major components: red blood cells, white blood cells, platelets (thrombocytes), and plasma. Members may personally decide whether they will accept medical procedures that involve their own blood or substances that are further fractionated from the four major components.

In south East Asian popular culture, it is often said that if a man's nose produces a small flow of blood, he is experiencing sexual desire. This often appears in Chinese-language and Hong Kong films as well as in Japanese and Korean culture parodied in anime, manga, and drama. Characters, mostly males, will often be shown with a nosebleed if they have just seen someone nude or in little clothing, or if they have had an erotic thought or fantasy; this is based on the idea that a male's blood pressure will spike dramatically when aroused.

Vampires are mythical creatures that drink blood directly for sustenance, usually with a preference for human blood. Cultures all over the world have myths of this kind; for example the 'Nosferatu' legend, a human who achieves damnation and immortality by drinking the blood of others, originates from Eastern European folklore. Ticks, leeches, female mosquitoes, vampire bats, and an assortment of other natural creatures do consume the blood of other animals, but only bats are associated with vampires. This has no relation to vampire bats, which are new world creatures discovered well after the origins of the European myths.

Blood residue can help forensic investigators identify weapons, reconstruct a criminal action, and link suspects to the crime. Through bloodstain pattern analysis, forensic information can also be gained from the spatial distribution of bloodstains.

Blood residue analysis is also a technique used in archeology.

Blood is one of the body fluids that has been used in art. In particular, the performances of Viennese Actionist Hermann Nitsch, Istvan Kantor, Franko B, Lennie Lee, Ron Athey, Yang Zhichao, Lucas Abela and Kira O' Reilly, along with the photography of Andres Serrano, have incorporated blood as a prominent visual element. Marc Quinn has made sculptures using frozen blood, including a cast of his own head made using his own blood.

The term "blood" is used in genealogical circles to refer to one's ancestry, origins, and ethnic background as in the word "bloodline". Other terms where blood is used in a family history sense are "blue-blood", "royal blood", "mixed-blood" and "blood relative".


What is the oldest prison still active in the US?

The New Jersey State Prison (NJSP), formerly known as Trenton State Prison, is a state men's prison in Trenton, New Jersey operated by the New Jersey Department of Corrections. It is the oldest prison in New Jersey and one of the oldest correctional facilities in the United States. It is the state’s only completely maximum security institution, housing the most difficult and/or dangerous male offenders in the inmate population. NJSP operates two security units and provides a high level of custodial supervision and control. Professional treatment services, such as education and social work, are a priority at the facility. The Bureau of State Use Industries operated the bedding and clothing shops that were once located in Shop Hall at the facility. These industries have been relocated to South Woods State Prison.

New Jersey State Prison

NJSP also housed New Jersey's men's death row until the state banned capital punishment in 2007. Its inmates include John Martini, who was condemned for the kidnapping and murder of a Bergen County businessman, and Jesse Timmendequas, who was sentenced to death for the rape and murder of 7-year-old Megan Kanka. This crime inspired the passing of Megan's Law, which requires communities to be notified when a convicted sex offender moves into their area.

New Jersey State Prison is a complex that consists of three separate but interconnected physical plants from three different eras of prison construction that took place on the property. The three sections are: The 1798 Penitentiary House; The 1832 Fortress Penitentiary; The 1982 Contemporary prison facility.

The 1798 NJ Penitentiary House, which was the first State Prison in New Jersey and the third in the nation after the Walnut Street Jail in Philadelphia and Newgate in New York City is also the oldest building still in operation as part of an active, working prison in the United States. This allows NJSP to lay claim to being the oldest continuously operating State Prison in the US. The only surviving portion of the 1798 Penitentiary House is the original Front House, which functioned originally as the living quarters for the Keeper of the State Prison, the four Assistant Keepers (The first 4 men who served in the capacity of what are known today as State Correction Officers), the Armory, administrative office space on the first floor and a row of cells for the confinement of disruptive prisoners in the basement. Since the Penitentiary House stopped housing prisoners within a few years after the 1832 Fortress Penitentiary opened, Auburn Correctional Facility can lay claim to having the oldest continuously operating cell house in the US.

After completion and the relocation of the Penitentiary House inmates to the new Fortress Penitentiary compound in 1836, the 1798 facility alternately served as the Mercer County jail facility during construction of their Workhouse in Titusville, NJ, and then as the State Arsenal until 1929, when all National Guard equipment and services that were based there were transferred to the newly completed ANG base at Sea Girt, at which time control of the empty compound was returned to the State Prison. In 1930, all of the Penitentiary House buildings were demolished, with the exception of the Front House, which was remodeled into a residence for the Keeper of the State Prison, a use for which it is still designated today. The cleared land on which the Penitentiary House cell houses and shop buildings had stood previously were enclosed in a 22 foot high reinforced concrete wall and opened as the Big Yard in 1930. This new, large recreation yard eased the cramped conditions inside the walls of the main compound, which up until that time had limited space to devote to outside recreation.

The second oldest portion of New Jersey State Prison, the Fortress Penitentiary, was constructed between 1832 and 1836, when the inmates from the Penitentiary House next door were moved over. The 1832 facility was constructed on a contiguous plot of land already owned by the State and controlled by the Penitentiary House, under the supervision of the Keeper of the State Prison, and made use of inmate labor during the four years of construction. Consequently, the 1836 Fortress Penitentiary compound is considered to be an addition to the existing State Prison on the property. This assertion is valid because the two compounds coexisted on the same property and were managed and controlled by the Keeper as a prison complex in which the same inmate population worked and were housed. As the State Prison is operated as a unified complex composed of separate distinct compounds today, this conclusion is defensible.

In his 1917 Master's Thesis, published as "History of the Penal, Reformatory and Correctional Institutions of New Jersey" the late Dr. Harry Elmer Barnes, the noted American historian published a history and analysis of the State Prisons, Reformatories and Penal Institutions of NJ up to that time. His work was an analysis of the application of the various penal philosophies and their successes, failures and changes from 1798 to 1917. He separated the Penitentiary House and the 1832 Fortress Penitentiary into two "Systems" in this work. The reader should note that "System" as used by Dr. Barnes was at that time used as we use "Paradym" today- His "First Prison System in NJ" as applied to the Penitentiary House and "Second Prison System in NJ" as applied to the 1832 facility did not describe two separate prisons nor did it indicate two separate prison agencies.

This was a history and description of New Jersey's transition away from the Congregate System of confinement, wherein all persons regardless of age, sex or mental state were simply confined in the Penitentiary House, to the Pennsylvania System of confinement, which consisted of keeping prisoners confined in single cells, completely isolated from other prisoners and the Keepers. The authority and management of the State Prison as an agency did not change – The Keeper as the agency head supervised the Penitentiary House, oversaw and contributed inmate labor to the construction of the Fortress Penitentiary between 1832 and 1836, and supervised the transfer of all inmates from the old to the new compound in 1836 and continued on in the new compound. This construction, transfer and continuation of operations from one side of the property to the other provides a link between the old and new compounds, and demonstrates that the New Jersey State Prison has existed and continuously operated in the same location since 1798. Thus, Dr. Barnes described a change in penal theory and practice, not the abolishion of the old buildings and governing agency and the substitution of a new one. No break in operation or management occurred.

The 1832 facility was expanded several times throughout the 19th Century with new construction adding wings in the years between 1859 and 1907, and larger Shop Hall buildings as well. In 1895–96 when 6 Wing was constructed, the original walls were extended to the corners of the old Penitentiary House compound to enclose that wing as well as the newer Shop Hall building, which heretofore had been outside the main walls.

Capital Punishment was moved from the County Jails to NJ State Prison in 1907, when the first execution was carried out using the new Electric Chair, built by Carl Adams of Trenton, in the shops of his Adams Electric Company. The last such electrocution took place in 1963. In 1979 the Death House (8 Wing), along with the old Hospital wing were demolished to make way for a new Gymnasium.

Ground was broken for the contemporary facility in 1979, and it was completed in 1982. No additions have been made since that time.

Previously the death row for men was the Capital Sentence Unit (CSU) in the New Jersey State Prison. This unit was first established in 1907. The same prison housed the death chamber, and the first death by electrocution occurred on December 11, 1907.

In 1999 death row inmate Robert "Mudman" Simon, who was convicted of killing a police officer, died during a fight.

The lethal injection chamber at the prison was never used, and the New Jersey Governor repealed the death penalty in December 2007. Therefore, the final execution to take place at the prison was a January 22, 1963 electrocution. The former lethal injection room now serves as an office.