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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]
- Southern Airways Flight 49
The hijacking of Southern Airways Flight 49 started on...
- United States national missile defense
GMD is designed to intercept a small number of nuclear-armed...
- Southern Airways Flight 49
Online maps to accompany the revised edition of the book Nuclear Heartland: A guide to the 450 land-based missile silos of the United States Each of the red markers corresponds to a...
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The last nuclear test by the United States was on September 23, 1992; the U.S. has signed but not ratified the Comprehensive Nuclear-Test-Ban Treaty. Currently, the United States nuclear arsenal is deployed in three areas: Land-based intercontinental ballistic missiles, or ICBMs; Sea-based, nuclear submarine-launched ballistic missiles, or ...
- 16 July 1945
- 23 September 1992
- 1 November 1952
- 21 October 1939
Global nuclear stockpiles, January 2023. The following is a list of states that have admitted the possession of nuclear weapons or are presumed to possess them, the approximate number of warheads under their control, and the year they tested their first weapon and their force configuration.
CountryWarheads [a](total)Warheads [a](deployed)First Test(date)5,0441,77016 July 1945 ( Trinity )5,5801,71029 August 1949 ( RDS-1 )2251203 October 1952 ( Hurricane )29028013 February 1960 ( Gerboise Bleue )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 ...
The data exchange also reported that the United States has 321 non-deployed ICBMs (263 Minuteman III and 58 MX) that are located at ICBM bases as well as at storage, repair and production facilities. The US submarine fleet includes 14 ballistic missile submarines of the Ohio class that are deployed at two bases.
