E. C. Berg

Sam Sparks

Sam Sparks worked for the J.A. Jones Construction Company.

Eleanor F. Caldwell

Eleanor Caldwell was a laboratory technician in the Health Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

John F. Van Doren

John F. Van Doren worked on the procurement and property staff at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Cyril J. Morzinski