The abuse of radiation continues to this day. During the Cold War, ethically reprehensible radiation experiments were conducted in the United States on untrained human subjects to determine the detailed effects of radiation on human health. Between 1945 and 1947, 18 people were injected with plutonium by Manhattan Project doctors. In Nashville, pregnant women were given radioactive mixtures. In Cincinnati, about 200 patients were irradiated over a 15-year period. In Chicago, 102 people received injections of strontium and caesium solutions. In Massachusetts, 57 children with developmental disorders were given oatmeal with radioactive markers. These radiation experiments were not stopped until 1993 under President Bill Clinton. But the injustice committed was not atoned for. For years, uranium hexafluoride caused radiation damage at a DuPont Company plant and to local residents. At times, the plant even deliberately released uranium hexafluoride in its heated gaseous state into the surrounding area to study the effects of the radioactive and chemically aggressive gas.