National Museum of Nuclear Science & History
W. M. Hopkins worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Virgil Harris worked on the Manhattan Project at Los Alamos. After the war, he worked for Sandia National Laboratories.
Herbert M. Lehr was a member of the Special Engineer Detachment who worked at Los Alamos during the Manhattan Project.
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.