National Museum of Nuclear Science & History
Ralph Carlisle Smith was born in 1910 in New York. He co-authored Project Y: The Los Alamos Story, with David Hawkins and Edith Truslow.
Duane Sewell began working with the Manhattan Project in 1941. He was one of the first people to arrive at Oak Ridge and experienced first-hand some of the difficulties there with cyclotrons and isotope separation.
Jens Thornton, or “Jim” (as he went by at Berkeley) was an electrical engineer employed by Stone & Webster engineering firm during the Manhattan Project.