National Museum of Nuclear Science & History
Malcolm McEwen worked for the United States Engineer District Office.
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.
C. E. Johnson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Ernest Bray worked for the Roane-Anderson Company.
