R. J. Hale

Mildred M. Summers

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

G. E. Barnes

Barnes worked in the United States Engineer District Office.

John F. Schafnitz

Roger Hultgren

Minnesota native Roger Hultgren worked for the DuPont Company as a chemist during the early 1940s, initally assigned to the Jolliet, Illinois munitions plans.