There is some rationale backing Kim Jong-un's actions, which are survival - survival for his regime, survival for his country. And he has watched, I think, what has happened around the world relative to nations that possess nuclear capabilities and the leverage they have, and seen that having the nuclear card in your pocket results in a lot of deterrence capability. The lessons that we learned out of Libya giving up its nukes and Ukraine giving up its nukes is, unfortunately, if you have nukes, never give them up.