F. E. Andrews

Joseph H. Heartberg

Joseph H. Heartberg was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

K. A. O’Connor

K. A. O'Connor worked for the Roane-Anderson Company.

Kenneth L. Cohn

Kenneth L. Cohn was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Bernard A. Hojnowski