National Museum of Nuclear Science & History
L. R. Zumwalt worked for the United States Engineer District Office.
Valente worked in the 100-D Area at Hanford during the Manhattan Project.
Robert Barker worked for the Tennessee Eastman Corporation at the Y-12 Plant.
John Mihalkanin was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
