National Museum of Nuclear Science & History
Delbert Ball was a procurement officer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
George Maronde was a security guard at the University of Chicago Metallurgical Lab. He stood guard outside Stagg Field when Chicago Pile-1 went critical on December 2, 1942.
Rollin L. Flanagin served in the 1st Ordnance Squadron.
M. E. Ridge worked for the United States Engineer District Office.
F. J. McCanna worked for the United States Engineer District Office.