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President Franklin Roosevelt's note to Vannevar Bush giving Bush the tentative go-ahead to build the atomic bomb, January 19, 1942.
Events > Early Government Support, 1939-1942 > A Tentative Decision to Build the Bomb, Washington, D.C., 1941-1942
Events > Difficult Choices, 1942 > Final Approval to Build the Bomb, Washington, D.C., December 1942
People > Administrators > Vannevar Bush, Director, NDRC (1940-1941) and OSRD (1941-1945)

President Franklin Roosevelt's note to Vannevar Bush giving Bush the tentative go-ahead to build the atomic bomb, January 19, 1942.

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