F. M. Olson

William “Bill” J. Knox

William “Bill” J. Knox was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Joseph H. Leopold

Joseph Leopold worked for the Kellex Corporation at the K-25 Plant.

Kenneth Pumphrey

Ken Pumphrey joined the Manhattan Project at Los Alamos in 1946, where he worked as a security guard until 1948.

Ray Musselman