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The hearings were motivated by politics and personal enmities, and reflected a stark divide in the nuclear weapons community. [320] One group passionately feared the Soviet Union as a mortal enemy, and believed having the most powerful weaponry capable of providing the most massive retaliation was the best strategy to combat that threat.
The anti-nuclear weapons movement grew rapidly because for many people the atomic bomb "encapsulated the very worst direction in which society was moving". [60] Peace movements emerged in Japan and in 1954 they converged to form a unified "Japanese Council Against Atomic and Hydrogen Bombs".
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.
Manhattan District From top to bottom, left to right: Chicago Pile-1, the first nuclear reactor K-25, the primary uranium enrichment site The Hanford B Reactor used for plutonium production The Gadget implosion device at Los Alamos Alsos soldiers dismantle the Haigerloch pile of the German nuclear weapons program The Trinity test, the first nuclear explosion Atomic bombings of Hiroshima and ...
The United States nuclear program since its inception has experienced accidents of varying forms, ranging from single-casualty research experiments (such as that of Louis Slotin during the Manhattan Project), to the nuclear fallout dispersion of the Castle Bravo shot in 1954, to accidents such as crashes of aircraft carrying nuclear weapons ...
Advances in nuclear weapons technology, spurred on by the first detonation of the Soviet nuclear bomb in 1949, led to great reductions in the size of nuclear weapons. By 1957, the Atomic Energy Commission (AEC) declared that it had created a small fission warhead that could be deployed for frontline use by infantrymen.
[173]: 291–296 In 1947, a docudrama titled The Beginning or the End chronicled the development of nuclear weapons and portrayed the Trinity test. [ 174 ] [ 175 ] In 1980, a television drama miniseries titled Oppenheimer , a co-production between the British Broadcasting Corporation and the American television station WGBH-TV , aired for seven ...
First nuclear weapons test, conducted as part of the Manhattan Project. Tested the Mark 3 Fat Man design. Crossroads: 1946 2: 2: 2: 21 42: First postwar test series Sandstone: 1948 3: 3: 3: 18 to 49 104: The first use of "levitated" cores made of oralloy. Tested components for Mark 4 design. Ranger: 1951 5: 5: 5: 1 to 22 40: First tests at the ...