Before the creation of the secret cities of Los Alamos, Oak Ridge and Hanford, the Manhattan Project hired the Mallinckrodt Chemical Works of St. Louis to refine the first uranium used in the atomic bomb dropped on Hiroshima. For the next two decades, Mallinckrodt continued its classified work for the Atomic Energy Commission during the Cold War. The resulting radioactive waste contaminated numerous locations in the St. Louis area some... see more