National Museum of Nuclear Science & History
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
William Jones worked for the Fercleve Corporation.
Helen Pellock (1926-1957) was a technician in the Chemistry Division of the Chicago Met Lab, working under Glenn Seaborg.
Shirley Bodmer (1925-2017) was a secretary at the Chicago Met Lab during the Manhattan Project.