National Museum of Nuclear Science & History
Delbert Ball was a procurement officer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Calhoun worked at the 100-B Area at Hanford during the Manhattan Project.
Brazier worked at Los Alamos during the Manhattan Project.
Granville K. Hartley served in the 1027th Air Material Squadron.
Petersen worked in the 200 West Area at Hanford during the Manhattan Project.