Nuclear Strategy and Weapons

Washington, D.C., June 6, 2023 - U.S. officials and NATO allies feared that international talks meant to strengthen the protection of civilians during conflicts could lead to a ban on the use of nuclear weapons, according to a September 1975 memorandum by the Pentagon’s Joint Staff posted today by the National Security Archive. Published as part of a new Electronic Briefing Book on the negotiations that produced Additional Protocol I to the 1949 Geneva Conventions, the Defense Department memo reveals some of the concerns that underlay the initial U.S.

Washington, D.C., March 24, 2023 - On Tuesday, March 28, 2023, PBS’s “American Experience” program premieres “The Movement and the ‘Madman,’” a documentary that tells the story of how the intensity of the U.S. anti-Vietnam War movement forced President Richard Nixon to abandon plans to escalate the conflict in the fall of 1969 and instead implement his “madman” theory, approving a secret alert of U.S. nuclear forces around the world to project the idea that he was “crazy” and force adversaries to back down.

Washington, D.C., March 20, 2023 -The declassified Air Force film shows the crew of a U.S. B-52 bomber reaching its “Positive Control” (“fail safe”) point on the way to its target in the Soviet Union. But instead of turning around as usual, they get an order to proceed to their assigned objective. Having received and authenticated a “Go Code” message from U.S. Strategic Air Command (SAC), the pilot announces, “We’re going in,” navigating the aircraft in low over mountains, lakes, fields, and forests to avoid Soviet air defenses.

Washington, D.C., November 18, 2022 - A top safety official at a U.S. nuclear weapons lab wrote that “the public must be encouraged to realize that risks [of an unintentional nuclear detonation] cannot be zero and cannot ever be really known,” according to a newly released 2001 history of U.S. efforts to mitigate the dangers of accidental or unsanctioned weapons detonations. Declassified in response to a Freedom of Information Act (FOIA) request by the National Security Archive, the history, written by former Sandia National Laboratories official William L.

Washington D.C., October 17, 2022 - In a secret “eyes only” memorandum for John F. Kennedy, written 60 years ago today at the outset of the Cuban Missile Crisis, U.N. Ambassador Adlai Stevenson admonished the president to abandon his initial plan to attack Cuba and to consider, instead, the diplomatic option of dismantling U.S. missile bases in Europe in return for the withdrawal of the Soviet missiles in Cuba.

Washington, D.C., October 14, 2022 - Today the National Security Archive publishes for the first time in any language a translation of the first meeting between Soviet Premier Nikita Khrushchev and Cuban Defense Minister Raul Castro on July 18, 1960. The newly available transcript helps explain Khrushchev’s 1962 determination that defending Cuba from U.S. intervention would require a massive Soviet military base in Cuba, together with the deployment of nuclear weapons.

Washington, D.C., August 8, 2022 – After years of research and planning, U.S. officials and scientists overseeing the Manhattan Project were startlingly unprepared for the emergence of evidence of the long-term effects of radiation generated by the atomic bomb – even after the Trinity test in July 1945 and the bombings of Hiroshima and Nagasaki 77 years ago this week, according to documents posted today by the National Security Archive. 

Washington, D.C., July 14, 2022 – For decades starting in the late 1940s, influential internal U.S. government analyses provided civilian and military leaders with staggering estimates of likely casualties in a nuclear conflict with the Soviet Union, but the sheer scale of those projected fatalities kept the reports classified until after the end of the Cold War.

Washington, D.C., May 29, 2012 - A secret exercise in 1986 by a U.S. government counter-terrorist unit uncovered a host of potential problems associated with disrupting a nuclear terrorist plot in the United States. Declassified documents released under the Freedom of Information Act (FOIA) and posted today by the National Security Archive offer the first detailed public look at the inner workings of the agencies, military units and other U.S. entities responsible for protecting the country from a terrorist nuclear attack.

Washington, D.C., June 2, 2022 – The apocalyptic threats emanating from Moscow over the Ukraine war raise the terrible prospect of nuclear weapons use. The probabilities may be low, but if a major nuclear war occurred, the catastrophic impact of a so-called nuclear winter could be felt on a global scale.