National Museum of Nuclear Science & History
Ralph Watson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Levey was a member of the Army Special Engineering Detachment who worked at the K-25 plant at Oak Ridge during the Manhattan Project.
Sappenfield worked at the 300 Area at Hanford during the Manhattan Project.
John Riddle was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
