now in north korea? >> well, the fact that we haven't had testing in quite some time is a success in my book, any way you slice it. there had been several tests before the conversations began and now they've come to a stop. look, it is important to note that ambassador bolton says they're monitoring the situation closely and they have more ways of determining exactly the development in north korea than commercialized satellite. i think we are on track, having conversations is good. the ultimate goal is complete irreversible, verifiable denuclearization, and we're on the way to doing that. >> there's not even definition of what that is. >> it is very clear what it is, complete, verifiable, irreversible. >> i know the phrase, but there's no agreed upon definition between kim and trump, the north koreans and americans on what