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US Army Center
U.s. Army Center of Military History: The Decision to Use the Atomic Bomb
In-depth analysis of the decision to create and drop the atomic bomb on Japan during World War II. Includes details on the Interim Committee.
Gilder Lehrman Institute of American History
Gilder Lehrman Institute: History Now: Online Exhibition: The Manhattan Project
[Free Registration/Login Required] Documents by Manhattan Project scientists expressing their concern about nuclear weapons after the bombings in Japan.
Other
World Nuclear Association: Hiroshima, Nagasaki, and Subsequent Weapons Testing
This article has information about the bombings of Hiroshima and Nagasaki. Additional information about the measures that have been taken about atomic warfare and testing since the bombings included.