Robert Harris

Frank Karcher

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

Sylvester H. Stinnett

V. J. Johnson

V. J. Johnson worked for the Union Carbide & Carbon Corporation.

Irene Balawender

Irene Balawender was a stenographer in the Instrument Section at the Metallurgical Laboratory in Chicago during the Manhattan Project.