First off - plenty of people are against coal plants for health reasons in addition to the environmental reasons. There is nobody cheering coal and blocking nuclear (and please don't bring up the Germany decommissioning of nuclear plants and keeping open coal plants because it doesn't speak to what I just said). Secondly, Three Mile Island represents the path to a possible outcome. Just because disaster was averted doesn't mean that the thinking about safety shouldn't be focused on the worst case scenario instead of the one that actually happened.