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United States and weapons of mass destruction information


United States of America
Location of United States of America
Nuclear program start date21 October 1939
First nuclear weapon test16 July 1945
First thermonuclear weapon test1 November 1952
Last nuclear test23 September 1992
Largest yield test15 Mt (1 March 1954)
Total tests1,054 detonations
Peak stockpile32,040 warheads (1967)
Current stockpile5,044 total[1] (2024)
Current strategic arsenal1,670[2] (2023)
Cumulative strategic arsenal in megatonnage≈820[3] (2021)
Maximum missile range13,000 km (8,078 mi) (land)
12,000 km (7,456 mi) (sub)
NPT partyYes (1968, one of five recognized powers)

The United States is known to have possessed three types of weapons of mass destruction: nuclear, chemical, and biological weapons. The U.S. is the only country to have used nuclear weapons on another country, when it detonated two atomic bombs over two Japanese cities of Hiroshima and Nagasaki during World War II. It had secretly developed the earliest form of the atomic weapon during the 1940s under the title "Manhattan Project".[4] The United States pioneered the development of both the nuclear fission and hydrogen bombs (the latter involving nuclear fusion). It was the world's first and only nuclear power for four years, from 1945 until 1949, when the Soviet Union produced its own nuclear weapon. The United States has the second-largest number of nuclear weapons in the world, after the Russian Federation.[5][6]

  1. ^ "Status of World Nuclear Forces – Federation Of American Scientists". Fas.org.
  2. ^ "Status of World Nuclear Forces – Federation Of American Scientists". Fas.org.
  3. ^ M. Kristensen, Hans (2021). "United States nuclear weapons, 2021". Bulletin of the Atomic Scientists. 77 (1). Taylor & Francis (T&F): 43–63. Bibcode:2021BuAtS..77a..43K. doi:10.1080/00963402.2020.1859865. S2CID 231722905.
  4. ^ The world's nuclear stockpile. 7 April 2010.
  5. ^ "Status of World Nuclear Forces".
  6. ^ "The world's nuclear stockpile". Aljazeera. 2010-04-07.

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