>> shepard: we are having serious mike problems? you. i wanted to ask you what happens if they can't control these plants is a meltdown possible. >> we could be certainly looking at extremely dangerous situation. we have been talking to experts all day. they tell us if the reactor continues to stay hot and keep building pressure, fuel rod casings can balloon and burst, exposing the radioactive core which could release intensely radioactive material. they have dispatched dozen 6 troops trained for chemical disasters to that area in case of a radiation leak along four vehicles designed for use in atomic, biological and chemical warfare. we will keep you updated with the latest information as it comes out. >> shepard: counting on it. president obama calling this catastrophic disaster describing the images of destruction as heart breaking and saying the u.s. is ready to help. >> japan is, of course, one of our strongest and closest allies. and this morning i spoke with prime minister khan on behalf of the american people i conveyed our deepest condolences,