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National Museum of Nuclear Science & History

J. Samuel (“Sam”) Walker is the former historian of the U.S. Nuclear Regulatory Commission and the author of Prompt and Utter Destruction: Truman and the Use of Atomic Bombs against Japan. He is also the author of five books on the history of regulating nuclear power, including Three Mile Island: A Nuclear Crisis in Historical Perspective and The Road to Yucca Mountain: The Development of Radioactive Waste Policy in the United States.

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William Lanouette

Tinian Island

William Lanouette is a writer and policy analyst, as well as an expert on the Manhattan Project who has written extensively about the politics of nuclear weapons and power.

Bob Cook

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Bob Cook is a nuclear engineer and consultant. He began his career by earning a B.A. in Physics from Washington University.

Boris Podolsky

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Harry Truman

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Harry S. Truman (1884-1972) was the 33rd President of the United States of America. Truman first learned of the Manhattan Project after the death of President Roosevelt in April of 1945, when he relinquished his role as Vice President and took the oath of office as the next president of the United States.