John J, Flynn

A. J. MacDonald

A. J. MacDonald worked for the Union Carbide & Carbon Corporation.

Hugo Leckelt

Hugo Leckelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Gertrude Gunn

Getrude Gunn worked for the Roane-Anderson Company.

Robert O. Pflumm