J. B. McCullough

Okey B. Ellison

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

R. C. Bradley

Bradley worked in the United States Engineer District Office.

Arthur S. Covert

Robert L. Whitcomb

Robert Whitcomb worked for the Kellex Corporation at the K-25 Plant.