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The United States is known to have possessed three types of weapons of mass destruction: nuclear, chemical, and biological weapons.As the country that invented nuclear 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.
1998 – May – India tests five more nuclear weapons as part of Operation Shakti at the Pokhran test site. This was India's second round of nuclear weapons testing. 1998 – May – Pakistan detonates five high-enriched uranium nuclear weapons in the Chagai Hills. A sixth nuclear test, at Kharan, was a plutonium device.
Anglo-American cooperation on nuclear weapons was restored by the 1958 US-UK Mutual Defence Agreement. As a result of this and the Polaris Sales Agreement, the United Kingdom has bought United States designs for submarine missiles and fitted its own warheads. It retains full independent control over the use of the missiles.
President Jimmy Carter leaving Three Mile Island Nuclear Generating Station for Middletown, Pennsylvania, April 1, 1979. Unexpectedly high costs in the nuclear weapons program, along with competition with the Soviet Union and a desire to spread democracy through the world, created "...pressure on federal officials to develop a civilian nuclear power industry that could help justify the ...
Several US nuclear weapons, partial weapons, or weapons components are thought [9] to be lost and unrecovered, primarily in aircraft accidents. The 1980 Damascus Titan missile explosion in Damascus, Arkansas, threw a warhead from its silo but did not release any radiation. [52]
Summary of US nuclear testing series Series or years Years covered Tests [Summ 1] Devices fired Devices with un-known yield Peace-ful use tests Non-PTBT tests [Summ 2] Yield range [Summ 3] Total yield (kilotons) [Summ 4] Notes Trinity: 1945 1: 1: 1: 21 21: First nuclear weapons test, conducted as part of the Manhattan Project. Tested the Mark 3 ...
Former Italian President Francesco Cossiga acknowledged the presence of US nuclear weapons in Italy. [119] US nuclear weapons were also deployed in Canada as well as Greece from 1963. However, the United States withdrew three of the four nuclear-capable weapons systems from Canada by 1972, the fourth by 1984, and all nuclear-capable weapons ...
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War