>> obviously the whole world has close eyes on north korea and their nuclear capability. it's believed they have a dozen or so nuclear weapons. what do we know about their ability to put that kind of a warhead on this kind of a missile? >> so what we know is that they haven't demonstrated that capability. i don't know if you would find anyone in the u.s. military at the highest levels who would say with confidence or certainty that they don't absolutely have that capability. i think that they're hopeful they do not, since they haven't demonstrated or tested it. but what people don't realize is, you know, this missile that they tested last night, it's a kn-17 with a reentry vehicle added onto the top. it's what the military calls a two-stage. some of these missiles that north korea is testing now are wider, they have a wider base. the miniaturization process isn't as difficult as some might think. they don't actually have to miniaturize the warhead as small as they have on the other missiles. at this point we don't believe they have that capability yet.