John A. Karas

Don L. Cottrell

Perry R. Gershon

Gershon worked in the United States Engineer District Office.

Minnie M. Daniels

Minnie M. Daniels was a laboratory technician and assistant in the Chemistry Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Elizabeth Howlett

Elizabeth Howlett was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.