National Museum of Nuclear Science & History
James Jensen was a machinist at Hanford, Washington from September 1944 to the end of the war. Jensen's security clearance allowed him to machine parts and complete various tasks for the maintenance of the nuclear piles.
Milton Kahn was a Chemistry graduate student, at the University of California. Kahn focused on Radiochemistry throughout his career.
J. S. Culver worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Klaus Fuchs (1911-1988) was a German theoretical physicist and spy who worked at Los Alamos during the Manhattan Project and passed atomic secrets to the Soviet Union.
