National Museum of Nuclear Science & History
C. M. Hart worked for the Harrison Construction Company.
Paul R. O’Connor was a junior chemist at the University of Chicago Met Lab during the Manhattan Project.
Melvin Bengston was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
G. E. Johnson worked for the United States Engineer District Office.
Dorothy Kerr worked for the H. K. Ferguson Company.
