National Museum of Nuclear Science & History
Carl Helrich (1895-1971) was a civil engineer for the J.A. Construction Company from 1943 to 1945 and helped construct the Oak Ridge town site and plant area.
Katherine Gnjec was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Julius Ashkin was an American physicist. Ashkin was born in Brooklyn, New York on August 23, 1920. He received a Ph.
Cecil W. Craft served in the 1st Ordnance Squadron.
