National Museum of Nuclear Science & History
D. D. Clayton worked for the Roane-Anderson Company.
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.
Anna Barbic was a laboratory assistant in the the Chemistry Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Robert O. Nohr was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.