Three Mile Island What Happened Aftermath Photo Gallery 20 Years Later A Nuclear Nightmare in Pennsylvania An undamaged nuclear reactor at the plant is still in operation. (Corbis photo) By Mark Stencel Washingtonpost.com Staff Saturday, March 27, 1999 Before the 1979 accident at Pennsylvania's Three Mile Island, few had heard of the nuclear power plant on the Susquehanna River. But the crisis ...

Fact Sheet on the Accident at Three Mile Island.

Twenty years ago, Three Mile Island was in the middle of the worst accident in the history of American nuclear power. CNN's Natalie Pawelski was a ninth-grader living about 12 miles away. Today, she covers environmental issues for CNN, and the experiences of 20 years ago still resonate.