National Museum of Nuclear Science & History
J. T. Holloway worked for the United States Engineer District Office.
Marte Previti was a part of the Alsos Mission, a Manhattan Project effort in Europe to discover the progress of the German atomic project.
Earl Rau served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Neil Bergen was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.