Cecil Bennett

Cyril D. Hetherington

Paul J. Cummings

Cummings worked for Stone and Webster Engineering Corporation.

Ogle W. Hess

Olge W. Hess was a research assistant at the University of Chicago’s Metallurgical Laboratory.

Celeste Hand

Celeste Hand was a switchboard operator at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.