National Museum of Nuclear Science & History
Harry Petcher's flat feet meant he couldn't be drafted, but still had an obligation to work for the war effort.
June H. Roberts was a research assistant in the Instruments Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Thomas R. Williams was a laborer at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
James N. Eckley served in the 1st Ordnance Squadron.