B. R. Longwell

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.

Arthur S. Opsahl

Arthur S. Opsahl served in the 603rd Air Engineering Squadron.

G. V. Packer

J. E. Berenski

Berenski worked in the United States Engineer District.