H. V. Turpeinen

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.

Olga D. Nelson

Olga Nelson was a staff worker at Los Alamos during the Manhattan Project.

Mel Dubin

William R. Purnell

William R. Purnell (1886-1955) was a Rear Admiral in the US Navy and served as the Navy liaison on the Military Policy Committee for the Manhattan Project.