National Museum of Nuclear Science & History
J. D. Renfroe worked for Clinton Laboratories at the X-10 Reactor.
William Karush (1917-1997) was an American mathematician and physicist. After earning his Ph.D. from the University of Chicago in 1942, Karush worked briefly at the Carnegie Institution of Washington before returning to Chicago to join the Manhattan Project.
Larson worked in the 200 West Area at Hanford during the Manhattan Project.
J. Powell worked for the Union Carbide & Carbon Corporation.
John Walker served in the army at Los Alamos during the Manhattan Project.