National Museum of Nuclear Science & History
Leslie Seward worked for the United States Engineer District Office.
Norman Harry Nachtrieb was an American chemist who worked on the Manhattan Project at the University of Chicago and Los Alamos.
Gilbert Plass was a Canadian physicist. Plass was born in 1922 in Toronto. He received a B.S. in physics from Harvard University before being hired to work on the Manhattan Project at the Chicago Met Lab, where he worked as an associate physicist.
