National Museum of Nuclear Science & History
Leroy Jackson was transferred into the Manhattan District, the branch of the United States Army Corps of Engineers tasked with overseeing the construction of critical Manhattan Project sites, shortly after its formation in 1942.
Neil Bergen was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
J. P. Alexander worked for the Kellex Corporation at the K-25 Plant.
Robert Irwin worked for the Tennessee Eastman Corporation at the Y-12 Plant.
