R. K. Leinhart

Russell Chadwick

Evelyn O. Gaston

Evelyn O. Gaston was a laboratory technician in the Health Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

James L. Gordon

James Gordon was an electrical engineer working as a civilian contractor for the DuPont Company at the Hanford, Washington site for the Manhattan Project.

Curtis L. Clark

Clark worked in the United States Engineer District Office.