National Museum of Nuclear Science & History
Frederick Trapnell was a consultant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Grace Hardin worked for the J.A. Jones Construction Company.
Robert O. Willis served in the 603rd Air Engineering Squadron.
Nelson Tibbatts worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Cathcart worked at the 200 East Area at Hanford during the Manhattan Project.