W. W. Porter

Harold R. Campbell

Leo Safranski

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

Opaline Calhoun

Opaline Calhoun was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Clarice Davis

Clarice Davis worked for the J.A. Jones Construction Company.