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The nuclear weapons tests of the United States were performed from 1945 to 1992 as part of the nuclear arms race. The United States conducted around 1,054 nuclear tests by official count, including 216 atmospheric, underwater, and space tests. [1] [notes 1] Most of the tests took place at the Nevada Test Site (NNSS/NTS) and the Pacific Proving ...
The United States conducted around 1,054 nuclear tests (by official count) between 1945 and 1992, including 216 atmospheric, underwater, and space tests. [9] Some significant tests conducted by the United States include: Shot "Baker" of Operation Crossroads (1946) was the first underwater nuclear explosion.
Six very large nuclear tests were conducted at the Bikini Atoll and the Enewetak Atoll as part of Operation Castle in 1954. The most notable was Castle Bravo, which was the first deployable (dry fuel) hydrogen bomb developed by the United States. Its yield, at 15 Mt, was over twice as powerful as was predicted, and remains the largest weapon ...
The Trinity test of the Manhattan Project was the first detonation of a nuclear weapon. The United States first began developing nuclear weapons during World War II under the order of President Franklin Roosevelt in 1939, motivated by the fear that they were engaged in a race with Nazi Germany to develop such a weapon.
The United States opened the nuclear era in July 1945 with the test of a 20-kiloton atomic bomb at Alamogordo, New Mexico, in July 1945, and then dropped atomic bombs on the Japanese c
There have been many attempts to limit the number and size of nuclear tests; the most far-reaching is the Comprehensive Test Ban Treaty of 1996, which has not, as of 2013, been ratified by eight of the "Annex 2 countries" required for it to take effect, including the United States. Nuclear testing has since become a controversial issue in the ...
Significant dates; Date of Nuclear Explosion: July 16, 1945 ... In subsequent atmospheric nuclear tests at the Nevada Test Site, United States Atomic Energy ...
From the first nuclear test in 1945, worldwide nuclear testing increased rapidly until the 1970s, when it peaked. [24] However, there was still a large amount of worldwide nuclear testing until the end of the Cold War in the early 1990s. [24] Afterwards, the Comprehensive Test Ban Treaty was signed and ratified by the major nuclear weapons ...