to try to get north korea to get rid of its nuclear weapons, to force them to do it have said for a long time we can't use precision guided munitions to eliminate the nuclear threat. it has to be a ground war. what's really interesting is on the eve of the president's going to asia, that this was released. that's the interesting bit. i think it's to make sure that everybody understands clearly what's involved in trying to get the north koreans to give up nuclear weapons by they're not going to do, dara. >> tell me about the ramifications of a decision like this. >> well, it's patently obvious to the casual observer that any attempt to get the north koreans to get rid of their nuclear weapons is probably going to fail unless you can get china to sign on. now, china's not going to do that for two reasons. first of all, china does not want lots of korean refugees