Leo A. Ortega, Jr.

Edward Czuba

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

E. F. Riggs

E. F. Riggs worked for the Tennessee Eastman Corporation at the Y-12 Plant.

J.N. Hull

Harold F. Koch

Harold Koch was an electrical engineer at Oak Ridge, Tennessee during the Manhattan Project.