E. Cybert, Jr.

Ben Benjamin

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.

H.R. Robinson

Frederick T. Hobbs

Frederick Hobbs worked for the United States Engineer District Office.

William P. Mungo

William Mungo worked for the J.A. Jones Construction Company.