National Museum of Nuclear Science & History
F. Roark served in the 390th Air Service Group.
Katherine Gnjec was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
John Vach was a guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
H. R. Chapman worked for the H. K. Ferguson Company.
John “Jack” Carleton Healey, a colonel in the U.S. Air Force, participated in the Manhattan Project as part of General Groves’ staff in Washington, DC.