Atomic Heritage Foundation

August 2, 1939

August 2, 1939

Pres. Roosevelt receives "The Einstein Letter" warning about the prospect of an atomic bomb.

Date Range:

1939CE Aug 2nd

Era:

1938 to 1939: Discovering Fission

Hear the stories of the Manhattan Project

Browse our collection of oral histories with workers, families, service members, and more about their experiences in the Manhattan Project.

Tour the Sites of the Manhattan Project

Tour some of the key locations of the Manhattan Project with an audio guide.

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Albert Einstein receiving his his certificate of U.S. citizenship in 1940 from Judge Philip Forman. Photo courtesy Al Aumuller/Library of Congress.

Scientist Refugees and the Manhattan Project

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