Clyde Fiddler

Anthony J. Matz

Anthony J. (“Tony”) Matz was a procurement officer at the University of Chicago Met Lab. He helped obtain, handle, and move many of the materials for Chicago Pile-1 and witnessed it going critical on December 2, 1942.

Arnold “Ace” Grubbe

Arnold Grubbe (1904-2002) was an engineer working for the civilian contractor Crane Company in Oak Ridge, Tennessee.

Sidney H. Yenny

Sidney Yenny was a staff worker at Los Alamos during the Manhattan Project.

F. E. Hill