George R. Holdren

R. J. McGonegle

R. J. McGonegle worked for the Tennessee Eastman Corporation at the Y-12 Plant.

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.

James E. Lyons

Minnie F. Strickland

Minnie Strickland worked for the United States Engineer District Office.