Ralph M. Bennett

Alvin Zelver

Al Zelver is an author and former Army intelligence officer who observed the wreckage of Hiroshima after the bombing and spent a year in Japan after the surrender.

David Rudolph

David P. Rudolph was an administrator in charge of inventory at the Chicago Metallurgical Laboratory.

E. E. Rathbone

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.