National Museum of Nuclear Science & History
A. O. Seidel worked for the Asbestos & Magnesia Materials Company.
John Fletcher worked for the Tennessee Eastman Corporation at the Y-12 Plant.
H. A. McFadden worked for the Roane-Anderson Company.
Minnie (Heller) Steinberg was a junior biologist in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
