National Museum of Nuclear Science & History
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
J. D. Carr worked for the Roane-Anderson Company.
Truman P. Kohman (1916-2010) was an American chemist. Kohman worked on the Manhattan Project at the University of Chicago Metallurgical Laboratory and at Hanford, where he met his wife, Jane Sievers.
