John P. Draughon

William M. Depa

Seymour Calvert

Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.

Richard L. Doan

Richard L. Doan was the Director of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

C. E. David

C. E. David worked for the Tennessee Eastman Corporation at the Y-12 Plant.