National Museum of Nuclear Science & History
Arthur S. Olson was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Ralph B. Larsen was a machinist at Los Alamos during the Manhattan Project. His wife, Ruth Anderson, also worked at Los Alamos.
Sadelle T. Greenblatt was a research assistant in the Instruments Division of the University of Chicago’s Metallurgical Laboratory during the Manhattan Project.
