S. W. Pratt

Harold E. Hoover

Harold Hoover was a member of the Special Engineer Detachment during the Manhattan Project. He worked as a filter foreman at the Y-12 Plant, but his real job was in counterintelligence, to ensure no sabotage occurred.

A.V. Rogers

Glen Bentley

Frank G. Foote

Frank Foote was the Principal Metallurgist at the Manhattan Project’s Metallurgical Laboratory at the University of Chicago.