National Museum of Nuclear Science & History
Mollie Sprio was a stenographer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Joseph H. Madden served in the 603rd Air Engineering Squadron.
Charles W. Hagen was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
N. J. Johnson worked for Hanley & Company.
Lyons worked for Stone and Webster Engineering Corporation.