In Spring of 1943, hundreds of scientists and technicians moved to a remote location in the mountains of New Mexico to work at a secret laboratory. Under the guidance of their leader, J. Robert Oppenheimer, they rushed to figure out how to channel the power of an atomic chain reaction to create a bomb. Meanwhile, secret plants in Tennessee and Washington sprung up overnight to produce the uranium and plutonium that would fuel the weapon.

But the leaders of the Manhattan Project faced another challenge: how to keep such a sprawling enterprise hidden from enemies and prevent the designs from falling into the wrong hands.

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