National Museum of Nuclear Science & History
Elizabeth Younghanse worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Anthony J. (“Tony”) Matz was a procurement officer at the University of Chicago Met Lab. He helped obtain, handle, and move many of the materials for Chicago Pile-1 and witnessed it going critical on December 2, 1942.
Ralph A. James (1920-1973) was a research associate in the Chemistry Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Halpern worked in the United States Engineer District Office.
