Stanley Anhalt

Ralph D. Belanger

Sergeant Ralph Belanger was an Assistant Flight Engineer assigned to the Bockscar’s original crew.

Hugo S. Kivisto

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.

Ralph J. Stalnaker