Ambrose Knapinski

Frederick LaFountain

Lillian Guadagna

Lillian Guadagna was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

W. W. Roberts

W. W. Roberts worked for the Roane-Anderson Company.

Clarence F. Hiskey

Clarence Francis Hiskey (1912-1998) was an American chemist and Soviet spy. He worked at Columbia University and the University of Chicago’s Metallurgical Laboratory during the Manhattan Project.