National Museum of Nuclear Science & History
N. F. Smyth worked for the Kellex Corporation at the K-25 Plant.
Chappell worked in the United States Engineer District Office.
William D. Crawford served in the 1027th Air Material Squadron.
Robert C. Hirt was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Frank Graham worked for the Midwest Piping and Supply Company.
