John W. Richter

Leo Safranski

Leo Safranski was a research associate at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Lomie F. Caho

Lomie F. Caho was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Wilmer C. Sadler

Frederick Kalinoff

Frederick Kalinoff worked for the Roane-Anderson Company.