National Museum of Nuclear Science & History
Ellis Ryan was a staff worker at Los Alamos during the Manhattan Project.
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.
W. H. Leedom worked for the Roane-Anderson Company.
Harold Powell worked for the United States Engineer District Office.
