National Museum of Nuclear Science & History
John Ryan was a staff worker at Los Alamos during the Manhattan Project.
Howard R. Kratz (1916-2013) was a nuclear physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Hatfield worked in the United States Engineer District Office.
Clark Prather worked for the Kellex Corporation at the K-25 Plant.
Nelson Smith worked for the United States Engineer District Office.
