National Museum of Nuclear Science & History
B. H. Ronfeld served in the 509th Headquarters.
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.
Bernard Sesko served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Ruth Marshak was an American teacher and the wife of physicist Robert Marshak. Marshak was born in 1916.