National Museum of Nuclear Science & History
R. M. Van Petten worked for the Kellex Corporation at the K-25 Plant.
Calvin B. Popwell served as a corporal in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Big Stink, and he and his crew were later reassigned to Luke the Spook.
Bucknum worked at the 200 East and 200 West Areas at Hanford during the Manhattan Project.
George Schaeffer was a staff worker at Los Alamos during the Manhattan Project.
