National Museum of Nuclear Science & History
John Klein was a member of the Special Engineering Detachment. He worked at the Metallurgical Lab at the University of Chicago and at Los Alamos.
Roger Hildebrand is an American physicist and Manhattan Project veteran. He is the S.K. Allison Distinguished Service Professor, Emeritus, at the University of Chicago and is affiliated with the Enrico Fermi Institute.
Ira Jones worked for the United States Engineer District Office.
Henry worked at the 300 Area at Hanford during the Manhattan Project.