National Museum of Nuclear Science & History
W. G. Butler worked for the J.A. Jones Construction Company.
Mangold worked in the 200 West 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.
