National Museum of Nuclear Science & History
C. H. Simpson worked for Clinton Laboratories at the X-10 Reactor.
D. N. Kelly worked for the J.A. Jones Construction Company.
Francis D. Thornhill served as a captain in the 393rd Bombardment Squadron. He was the navigator on the Straight Flush during the Hiroshima mission.
James Barton worked as a carpenter for the DuPont Company at the Hanford, Washington site. He never knew he was working on the atomic bomb until after it was dropped in Japan.