National Museum of Nuclear Science & History
J. N. Holt worked for the United States Engineer District Office.
T. R. Elkins worked for the H. K. Ferguson Company.
Ken Pumphrey joined the Manhattan Project at Los Alamos in 1946, where he worked as a security guard until 1948.
Werner H. Haak was a laboratory assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
