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National Museum of Nuclear Science & History

George R. Holdren

EngineerK-25 Plant

Oak Ridge, TN
EngineerManhattan Project VeteranMilitary VeteranSpecial Engineer Detachment
Oak Ridge, K-25

Attended Pennsylvania State University.

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George Lefevre Jr.

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Attended Columbia University.

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William R. Purnell

Washington, DC

William R. Purnell (1886-1955) was a Rear Admiral in the US Navy and served as the Navy liaison on the Military Policy Committee for the Manhattan Project.