Horace King

Mathias A. Klinger

Mathias A. Klinger was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Sonia Weiner Katz

Sonia Weiner Katz was a secretary in the Chemistry Division of the Chicago Met Lab during the Manhattan Project.

A. J. MacDonald

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

Robert Martin