National Museum of Nuclear Science & History
T. L. Leahy worked for the United States Engineer District Office.
Williams Helps worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Samuel Podgor was born to Russian-migrants in New York City. He served in the Special Engineer Detachment at Los Alamos, NM where he worked in the Theoretical Division under Klaus Fuchs.
Robert Keen enlisted in the military on December 28, 1944 and began his training for the U.S. Army Corps of Engineers in January of 1945.
