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Leo Szilard invented the [[atomic bomb]]. He is credited with having the idea of a nuclear chain reaction to release massive amounts of energy, and with convincing [[Fermi]], [[Einstein]], and others that it is possible. He received a US patent for it.

Leo Szilard invented the [[atomic bomb]]. He is credited with having the idea of a nuclear chain reaction to release massive amounts of energy, and with convincing [[Fermi]], [[Einstein]], and others that it is possible. He received a US patent for it. In 1945, after the [[Manhattan Project]] had made a successful atomic bomb, Szilard started a [[petition]], signed by a number of his fellow atomic [[scientist]]s, asking that the bomb not be used against [[Japan]].[http://www.nas.edu/history/members/szilard.html]