National Museum of Nuclear Science & History
Manning worked for Stone and Webster Engineering Corporation.
Fred D. Butler served as a private first class in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Laggin’ Dragon.
Libby worked in the 200 W Area at Hanford during the Manhattan Project.
W. A. Gracey worked for the Roane-Anderson Company.
