National Museum of Nuclear Science & History
Greenwalt worked at the 300 Area at Hanford during the Manhattan Project.
Ike Smith worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Ruby Kidd worked for the Kellex Corporation at the K-25 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.