Richard L. Riedel

Frank N. Merrill

Jack Powers

Jack Powers worked for the J.A. Jones Construction Company.

Richard Lyon

Richard Lyon was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

James Franck

James Franck (1882-1964) was a German physicist and winner of the 1925 Nobel Prize for Physics.   During the Manhattan Project, Franck served as Director of the Chemistry Division of the University of Chicago’s Metallurgical Laboratory.