Clarence H. Kroll, Jr.

Fred Horina

P. F. Thomason

P. F. Thomason worked for Clinton Laboratories at the X-10 Reactor.

Martha G. Johnson

Martha G. Johnson was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Carl H. Betz

Betz worked at Los Alamos during the Manhattan Project.