National Museum of Nuclear Science & History
Sergeant Frank Karcher was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Dahleen worked in the United States Engineer District Office.
Olga (Giacchetti) Fineman was a technical assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory during the Manhattan Project.
Theodore “Ted” Hall (1925-1999) was an American physicist and an atomic spy who passed along detailed information about the implosion-type “Fat Man” bomb and several processes for purifying plutonium to the Soviet Union.
