National Museum of Nuclear Science & History
J. L. Ledgerwood worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Hayes worked in the United States Engineer District Office.
C. O. Carpenter worked for the Roane-Anderson Company.
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.