National Museum of Nuclear Science & History
William Stephenson worked for the J.A. Jones Construction Company.
W. H. McEachern worked for the Fercleve Corporation.
S. Alford worked for the Roane-Anderson Company.
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.
John Brill was a guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
