John E. Phipps

Ralph B. Larsen

Ralph B. Larsen was a machinist at Los Alamos during the Manhattan Project. His wife, Ruth Anderson, also worked at Los Alamos.

John Geffel Sr.

John Geffel worked at Oak Ridge as the Prime Building Contractor for Construction of the Oak Ridge facilities.

Donald L. Harvey

George W. Campbell

George W. Campbell was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.