National Museum of Nuclear Science & History
Harold Katz worked for the Roane-Anderson Company.
H. L. Shaefer worked for the Edenfield Electric Company.
Kay Manley, Canadian-born, came to the United States in 1933 to study. She and her husband John Manley were at the Manhattan District in Chicago, when her husband was personally called by Leo Szilard and asked to move from the Met Lab to Los Alamos.
Butler worked at the 300 Area at Hanford during the Manhattan Project.
