National Museum of Nuclear Science & History
E. W. Smith worked for the Union Carbide & Carbon Corporation.
Eugenia M. Jackson was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Berenski worked in the United States Engineer District.
Ben Benjamin was a sergeant in the Special Engineer Detachment during the Manhattan Project. He had previously worked in industry making lenses and prisms, and was assigned to the Optics Group to help with photographing the Trinity Test.