John P. Wittemore

Ralph Lapp

Ralph Lapp was an American physicist. He was born in Buffalo, New York in 1917. He was completing his PhD at the University of Chicago when he stumbled upon Enrico Fermi’s team working under Stagg’s Field in December of 1942, and was hired on the spot to work on the development of the atomic bomb.

Helen H. Thompson

J.O. Salisbury

Gertrude Nissenbaum

Gertrude Nissenbaum was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.