National Museum of Nuclear Science & History
Arthur S. Opsahl served in the 603rd Air Engineering Squadron.
Smith worked at the 200 East Area at Hanford during the Manhattan Project.
Marilyn Hanna was trained as a clerk typist, and worked for the Manhattan Project in Oak Ridge and later for the Security and Patent divisions in Washington, DC.
George Maronde was a security guard at the University of Chicago Metallurgical Lab. He stood guard outside Stagg Field when Chicago Pile-1 went critical on December 2, 1942.
