National Museum of Nuclear Science & History
John M. Sprecher was a chemical engineer. During the Manhattan Project, he worked for DuPont in Wilmington, DE.
Marjorie B. Housewright was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Dr. Alexander Langsdorf (1912-1996) was an American physicist who worked under Enrico Fermi at the University of Chicago.
