National Museum of Nuclear Science & History
Madsen worked in the 100 D Area at Hanford during the Manhattan Project.
Hugh Barnett worked for the Union Carbide & Carbon Corporation at Manhattan, NY and Oak Ridge, TN during the Manhattan Project.
Reuben McCord was a chemist who worked at several Manhattan Project sites. After graduating from Erskine College in South Carolina, he was recruited to work at the University of Chicago Metallurgical laboratory.