John M. Naugle

John Harding

John Harding worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Alline D. McDonald

Joseph LaRocco

Joseph LaRocco was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Anna Barbic

Anna Barbic was a laboratory assistant in the the Chemistry Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.