Cyrus Feldman

John Mihalkanin

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

John B. Riddle

John Riddle was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.

L. R. Michener

Frank Gerhart

Frank Gerhart worked for the Tennessee Eastman Corporation at the Y-12 Plant.