National Museum of Nuclear Science & History
J. P. Valliant worked for the Union Carbide & Carbon Corporation.
James F. “Jim” Nolan was a Captain in the US Army Medical Corps, the Chief Medical Officer for the Los Alamos site of the Manhattan Project, and a Special Consultant to Project Alberta on Tinian Island.
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.