National Museum of Nuclear Science & History
J. R. Stark worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Greenwalt worked at the 300 Area at Hanford during the Manhattan Project.
Levey was a member of the Army Special Engineering Detachment who worked at the K-25 plant at Oak Ridge during the Manhattan Project.
James Gordon was an electrical engineer working as a civilian contractor for the DuPont Company at the Hanford, Washington site for the Manhattan Project.