National Museum of Nuclear Science & History
Seymour Bernstein (1923-2015) was an American chemical engineer who worked on the Manhattan Project. He was a member of the Special Engineer Detachment at Oak Ridge and worked as a laboratory supervisor at the K-25 Plant.
Leon Leventhal was a nuclear chemist and radiation expert who worked at Oak Ridge, the University of Chicago’s Met Lab, and Los Alamos Laboratory during the Manhattan Project.
Calhoun worked at the 300 Area at Hanford during the Manhattan Project.
