National Museum of Nuclear Science & History
McMahon worked in the 100 D Area at Hanford during the Manhattan Project.
Leston Stark was a staff worker at Los Alamos during the Manhattan Project.
Wallace Addis worked for the Kellex Corporation at the K-25 Plant.
Downs worked in the United States Engineer District Office.
Haigh worked at the 100-F Area at Hanford during the Manhattan Project.