Three Mile Island
According to The Guardian, working from data compiled by the International Atomic Energy Agency, there have been 33 nuclear accidents (and more minor incidents) since the first at Chalk River in Canada, 1952. Given the scope of destruction, potential effects on human life and the length of time radiation contaminates affected areas, the threat of nuclear accident has always been a major concern.
The article linked below lists twenty facts pertaining to nuclear accidents. One fact concerns the 1986 Chernobyl disaster in the Ukraine. In the days immediately following the accident, the needles of pine trees within 1.5 miles of the plant actually turned red! Today, the trees appear twisted and mangled, having the appearance of sickly bushes.
Read 19 additional facts about nuclear accidents here.