R.G. Smith

Kenneth L. Cohn

Kenneth L. Cohn was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Leslie L. Nemeth

Leslie Nemeth was a staff worker at Los Alamos during the Manhattan Project.

E.J. Simpson

D.M. Ellett

​D. M. Ellett is a mechanical engineer who joined the Manhattan Project after the end of World War II.