National Museum of Nuclear Science & History
Barnes worked in the United States Engineer District Office.
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Helen R. Hughes was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Charles W. Schwab served in the 393rd Bombardment Squadron.
L. S. Baldin worked for the Edenfield Electric Company.
