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National Museum of Nuclear Science & History

Andrew M. Hedrick

PrivateLos Alamos, NM

Manhattan Project VeteranMilitary PoliceMilitary Veteran

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Roswell L. Pooler

Los Alamos, NM

Roswell Pooler served in the Army at Los Alamos during the Manhattan Project.

Harry Truman

Washington, DC

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.

Daniel B. Mahoney

Los Alamos, NM

Edgar B. Stein

X-10 Graphite Reactor

Attended the University of Illinois.