Power/energy: TMI plus 2: Two years after the ordeal at Three Mile Island, a restructured, safer nuclear industry is envisaged

March 28, 1979, has become one of those rare days when time seems to divide into two segments: pre-TMI and post-TMI. The events that began on that day at Three Mile Island in Pennsylvania developed into the nation's worst nuclear reactor accident so far, and the trauma has prompted changes in reactor design and the safety strategy of the nuclear power industry.