the art. so far, no survivors there. up in a port city north of us, unexpected joy. this man, rescued after five days buried in rubble. reunions in person. and by phone. and not far away, one of those signs of community we've come to expect everywhere in japan. the noodle shop escaped the water, but is offering meals at no charge. the cook says his home was washed away, but he comes to work, he says, because he wants to do something for those that have even less. and we have seen so much generosity here. when we come back, what is the real danger that radiation from japan could travel all the way to the united states? and how does that compare to the radiation we receive already in our daily lives? ♪