Japanese Nuclear Crisis Upgraded to Chernobyl Level

The badly damaged Fukushima Dai-ichi nuclear power plant has been upgraded from 5 to 7 on the International Nuclear and Radiological Event Scale. That's, in case you were wondering, out of seven—the only other nuclear crisis to reach the same level is Chernobyl. » 4/11/11 9:05pm 4/11/11 9:05pm