daichi plant. official believe 2 of the 6 reactors there may have been a partial meltdown. i stress partial in 2 of the 6 reactors but they can't confirm that at this point because it is simply too hat insiot inside th reactors to check and they're pumping in sea water. jim, explain what that means, a partial meltdown in two reactors. >> well, i know when people hear the world meltdown, anderson, they get very panicky and think about that -- think about chernob chernobyl, they think about three-mile island but there is a continuum here. you can have partial meltdowns. that's very different than the consequences you would have if you had a total melt dodown. with a total meltdown, fuel rods cash fire, melt an congregate at the bottom of the reactor vessel and when they do that, they -- you get what's called a