National Museum of Nuclear Science & History
J. R. Hatfield worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Ralph B. Larsen was a machinist at Los Alamos during the Manhattan Project. His wife, Ruth Anderson, also worked at Los Alamos.
F. S. Tew worked for the United States Engineer District Office.
Andrew H. MacMahon was the Chief Property Officer of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
