Three Mile Island is the worse nuclear accident in US history. Officials say the amount of radiation released from the plant during the 1979 disaster was small — the maximum anyone could have received was equivalent to a chest X-Ray. But medical evidence proves otherwise. Dr. Steven Wing of the University of North Carolina Chapel Hill, says cancers in local residents were elevated under the path of the radioactive plume that escaped from the plant. Symptoms of radiation exposure were severe and there were chromosomal abnormalities reported in people even 15 years after the event.