National Museum of Nuclear Science & History
C. Eppes 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.
Helen J. Arson was a laboratory technician in the Health Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
J. A. Kilmer worked for the Tennessee Eastman Corporation at the Y-12 Plant.