John F. Flanigan

H. A. McWade

H. A. McWade worked for the Edenfield Electric Company.

Harold B. Nilling

Harold B. Nilling was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Clarence Signaigo

Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.

William W. Underhill