could have 50 or 100 nuclear bombs. what are you hearing? >> they have continued to push their proliferation. there's no secret to this. they're also advancing how they're gathering nuclear material. so for north korea, what they have now and their testing capability, we can tell what they're able to do. but we don't know what they're able to do next, because that will be the next test coming out. >> south korea right now, a key u.s. ally, i understand they're extremely nervous about this potential threat from north korea, and they see some north korean cyber attacks against south korea that are very alarming. what are you hearing? >> so you have testing from north korea for nuclear testing. you have advanced actions happening on the ground above. north korea reaching into south korea with a cyber attack to attack the cyber command in south korea. you have instability in south korea right now with president park going through a massive corruption scandal and they're being challenged on impeachment