The Rocky Flats Plant, a former U.S. nuclear weapons production facility in the state of Colorado, caused radioactive contamination within and outside its boundaries and also produced "area-wide contamination of the Denver area."[REF][REF]
As noted in a scientific journal, "Exposures of a large population in the Denver area to plutonium and other radionuclides in the exhaust plumes from the plant date back to 1953."[REF]