Paul W. Guth

Clarence C. Simpson

Stanley Krzyck

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

C. M. Sheldon

C. M. Sheldon worked for the J.A. Jones Construction Company.

Mildred M. Summers

Mildred Summers was a chemical technician at the Metallurgical Laboratory in Chicago during the Manhattan Project.