W. F. Underwood

Arlene G. Scheidenhelm

Arlene Gertrude Scheidenhelm (1908-1970) was the Director of the Women’s Army Corps for the Manhattan District.

S. L. Leatherman

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.

S. L. Ungricht