John J. McGurn

C. M. Walker, Jr.

C. M. Walker, Jr. worked for the Kellex Corporation at the K-25 Plant.

R. E. Fiedler

Fiedler worked in the United States Engineer District Office.

John T. Connolly

Leonard Krouldis

Leonard Krouldis was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.