today, geraldo. >> geraldo: greg palkot, you stand by. let me bring in our guests. and in washington, nuclear expert paul gunter. paul, japan's top government spokesman just announced that radiation at the nuclear plant briefly rose above legal limits. what are the health consequences to the people in that region? >> well, there is an immediate concern for the health consequences to children certainly. as welling a pregnant women. these are the top priorities that must be protected. we are hoping that these people are prioritized in the evacuation. clearly this is just the precursor so what we are fearing is a much more serious accident with more far-reaching consequences. >> geraldo: what is a nuclear melt down? what is a meltdown? >> what it is it when the