March 1979: Reactor meltdown at Three Mile Island, PA. 140, 000 people evacuated.

FORBES: China, India Dominate List of World's New Nuke Power Projects

The 1979 U.S. meltdown at Three Mile Island is also rated a five.

FORBES: Japanese Commission: Nuclear Crisis as Bad as Chernobyl

There could be the kind of meltdown, I guess, like occurred -- partial meltdown that occurred at Three Mile Island, and that would -- another agency might have the lead -- because they would have the expertise, so they would have the lead in responding to that.

WHITEHOUSE: Press Briefing

Following the 1979 near-meltdown of a reactor at Pennsylvania's Three Mile Island, the nuclear power industry suddenly had all the appeal of Dr. Strangelove in his doomsday bunker.

FORBES: Going Nuclear

Following the 1979 near meltdown of a reactor at Pennsylvania's Three Mile Island, the nuclear power industry suddenly had all the appeal of Dr. Strangelove in his doomsday bunker.

FORBES: Going Nuclear