Nuclear weapons are a part of North Korea’s national identity. It’s in their constitution. It’s in their art. It’s in their education system. It’s in the way that people talk about things to themselves. It is the guarantor of North Korea’s status and it’s the guarantor of Kim [Jong-un]. Unless we see a difference in the way, or any attempt at shaking down that ideological infrastructure of North Korea’s nuclear identity, then I don’t see denuclearization as something that is a realistic goal.