Houston C. Willson

Frank E. Smith

Richard C. Stephens

Richard Stephens worked for the United States Engineer District Office.

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.

M. P. Covert

M. P. Covert worked for the Tennessee Eastman Corporation at the Y-12 Plant.