National Museum of Nuclear Science & History
MacDonald worked for Stone and Webster Engineering Corporation.
Frederick D. Clayton served as a staff sergeant in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Bockscar.
William J. Easton served as a 2nd lieutenant in the 393rd Bombardment Squadron. He was the pilot regularly assigned to the B-29 Next Objective.