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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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Michael Joseloff

Michael Joseloff is a four-time Emmy Award-winning TV news and documentary producer. While working as a producer for the MacNeil Lehrer Newshour in 1993, he worked on a program related to alleged Soviet espionage during the Manhattan Project.

Henry Stimson

Washington, DC

As Secretary of War under Presidents Franklin D. Roosevelt and Harry Truman, Henry L. Stimson (1867-1950) oversaw the entire Manhattan Project, and was responsible for appointing key project leaders and authorizing project construction sites across the US.

Darrell Dvorak

Trinity Site

Darrell Dvorak’s father-in-law, Colonel Clifford John Heflin, worked for the Manhattan Project.

Fred Stemshorn

Washington, DC