National Museum of Nuclear Science & History
Carl Neumann worked for the United States Engineer District Office.
Edward C. Stephenson served in Project Alberta and the United States Naval Reserves.
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.
