K. C. Webster

J. J. Thompson

J. E. Brock

J. E. Brock worked for the Roane-Anderson Company.

Francis Bernard Donlan

Francis Bernard “Bernie” Donlan was an American photographer and a clerk at the Chicago Met Lab during the Manhattan Project.

Joseph Caldwell

Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.