National Museum of Nuclear Science & History
Mack worked at the 300 Area at Hanford during the Manhattan Project.
Mary Elizabeth Barnes was a radiochemist working in the Y-12 Plant in Oak Ridge, Tennessee from 1946 to 1952.
C. H. Smith worked for the J.A. Jones Construction Company.
Irvin F. Poehls served as a technical sergeant in the 390th Air Service Group.