John E. Collins

Selma Shupp

Selma Shupp was a technician in the Chemistry Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.

C. B. Newman

John Mihalkanin

John Mihalkanin was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

J. L. Ledgerwood

J. L. Ledgerwood worked for the Tennessee Eastman Corporation at the Y-12 Plant.