I've been watching this closely as well, Dave. Several explosions, and worst of all, trouble cooling the core. I spent a great deal of time as an undergraduate in the most powerful research reactor in the U.S. (just off the campus at Mizzou, where I still work). My feelings are so mixed regarding the benefits and detriments of nuclear energy that I couldn't begin to sum them up here. Needless to say, I'll be watching and hoping that the impact to human health and the environment is as minimal as possible.