National Museum of Nuclear Science & History
G. C. Kreis worked for the J.A. Jones Construction Company.
H. L. Hoss served in the 509th Headquarters and Base Services Squadron.
A. B. McKee worked for Clinton Laboratories at the X-10 Reactor.
Clarence H. Mathews was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
