National Museum of Nuclear Science & History
R. Y. Blackwell worked for the Fercleve Corporation.
Nathan Safferstein (1921-2013) was an American counterintelligence agent during the Manhattan Project.
Millard Line worked for the A. S. Schulman Electric Company.
W. Petterson worked for the United States Engineer District Office.
Leonard Krouldis was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
