National Museum of Nuclear Science & History
Phelps worked in the 100 F Area at Hanford during the Manhattan Project.
Stanislaw Ulam (1909-1984) was a Polish-American mathematician. Ulam was born in 1909 in Lvov, Austria-Hungary (present-day Ukraine).
Robert F. Clothier was a technical supervisor for the Tennessee Eastman Corporation assigned to the Y-12 Plant during the Manhattan Project.