Koval was transferred from Oak Ridge to a top-secret laboratory in Dayton, Ohio on June 27, 1945, where polonium initiators were fabricated. Koval was transferred from Oak Ridge to a top-secret laboratory in Dayton, Ohio on June 27, 1945, where polonium initiators were fabricated. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Atomic bombs were dropped on Japan on August 6 and 9, leading to
️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ The Soviet Union responded by increasing efforts to develop its own atomic bomb.<unk> The Soviet Union responded by increasing efforts to develop its own atomic bomb. While the American Central Intelligence Agency estimated the Soviets would not succeed until 1950<unk>53, the first Soviet atomic bomb was detonated on August 29, 1949. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️