National Museum of Nuclear Science & History
Johnson worked at the 100-F Area at Hanford during the Manhattan Project.
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.
Ernest Greer worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Rolland Perry was a staff worker at Los Alamos during the Manhattan Project.
