National Museum of Nuclear Science & History
F. H. Stewart served in the 509th Headquarters.
Alfred Pfanstiehl was a junior physicist at the Chicago Met Lab during the Manhattan Project. Pfanstiehl was a signatory of the Szilard Petition, an attempt to avert military use of the atomic bomb against Japan.
Duke worked for Stone and Webster Engineering Corporation.
R. H. Duncan worked for the Comstock-Bryant Electric Company.