John P. Wittemore

Fred Edeskuty

George Koval

George Koval was an American chemical engineer and one of the most important Soviet spies of the 20th century.

A. L. Crawford

A. L. Crawford worked for the J.A. Jones Construction Company.

Lucien Nerman

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