National Museum of Nuclear Science & History
Before the war Oswald Greager was a high-ranking DuPont chemist. He took leave from DuPont in 1942 to join the Army's Chemical Warfare Service.
William J. Johnston served in the 1027th Air Material Squadron.
Roland Davis was a laboratory assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab) during the Manhattan Project.
Frank E. Keene was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
