National Museum of Nuclear Science & History
Margaret Strombeck was a swtichboard operator at the Metallurgical Laboratory in Chicago during the Manhattan Project.
John P. McBride was a research assistant in the Chemistry Division at the Chicago Met Lab. He was later assigned to Oak Ridge, where he worked on plutonium purification and on isolating uranium-233 isotopes from thorium.
A. O. Seidel worked for the Asbestos & Magnesia Materials Company.
