W. C. Livermore

George Dykes

George Dykes worked for the Union Carbide & Carbon Corporation.

I. Rosenbaum

Thurl Sharrett

Thurl Sharrett worked for the Tennessee Eastman Corporation at the Y-12 Plant.

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.