Marion M. Villarreal

Robert B. Sackheim

Robert Sackheim was an American scientist and advertiser.   Sackheim was born in New York. He earned a B.

Leslie G. Ritner

Leslie Ritner was a member of the Special Engineer Detachment at Los Alamos. He was among the first engineers sent to Los Alamos from Camp Claiborne, Louisiana in late January 1944, serving for two years before being discharged in the spring of 1946.

W.E. Spicer

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.