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The United States was the first country to manufacture nuclear weapons and is the only country to have used them in combat, with the bombings of Hiroshima and Nagasaki in World War II. Before and during the Cold War, it conducted 1,054 nuclear tests, and tested many long-range nuclear weapons delivery systems. [Note 1]
- 16 July 1945
- 23 September 1992
- 1 November 1952
- 21 October 1939
Jul 2, 2020 · The nuclear age began on July 16, 1945, when the United States tested the first atomic bomb. Less than a month later, the United States would become the only nation to use nuclear weapons in a conflict, dropping atomic bombs on Hiroshima and Nagasaki. At its peak, the United States had more than 31,000 nuclear weapons in its stockpile. Through various […]
4 days ago · FAS researchers, in partnership with the Bulletin of Atomic Scientists, release this seminal account each year in the “Nuclear Notebook” Washington, D.C. – May 7, 2024 – Nuclear experts at the Federation of American Scientists (FAS) today released “Nuclear Notebook: United States Nuclear Weapons 2024,” an annual overview of the current status and trends of the U.S. nuclear weapons ...
Apr 28, 2014 · 1.24. Shortest range (in miles) of a U.S. nuclear shell. Known as the “Davy Crockett,” the W54 weapon, a small nuclear warhead with a weight of 51 pounds, was fired by a recoilless gun mounted ...
Jan 16, 2023 · Nonstrategic nuclear weapons. The United States has only one type of nonstrategic nuclear weapon in its stockpile: the B61 gravity bomb. The weapon currently exists in two versions: the B61-3 and the B61-4 with yields varying from 0.3 kilotons up to 170 and 50 kilotons, respectively. A third version, the B61-10, was retired in September 2016.
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The B83 is a variable-yield thermonuclear gravity bomb developed by the United States in the late 1970s that entered service in 1983. With a maximum yield of 1.2 megatonnes of TNT (5.0 PJ), it has been the most powerful nuclear weapon in the United States nuclear arsenal since October 25, 2011 after retirement of the B53. [1]
A compilation of platforms and weapons, the three legs of the U.S. nuclear triad serve as the backbone of America’s national security. The triad, along with assigned forces, provide 24/7 ...
