Michael A. Anthony

Ralph J. Belcher

Leo P. Hassen

Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Philip Grant Koontz

Philip G. Koontz was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

E. J. Murphy

E. J. Murphy worked for the United States Engineer District Office.