When the Soviet Union detonated an [[atomic bomb]] in August 1949 based on secrets stolen from the United States, Teller began advocating construction of a far more powerful hydrogen bomb. He derived how to accomplish this with mathematician [[Stanislaw Ulam]]. | When the Soviet Union detonated an [[atomic bomb]] in August 1949 based on secrets stolen from the United States, Teller began advocating construction of a far more powerful hydrogen bomb. He derived how to accomplish this with mathematician [[Stanislaw Ulam]]. |