North Korea says it has successfully tested its largest intercontinental ballistic missile. And experts say it could potentially deliver a nuclear warhead to targets in the continental United States. But what is North Korea's ultimate goal? And how can the United States and its allies deter Pyongyang? Mary Louise Kelly discusses that with NPR correspondent Anthony Kuhn and Victor Cha of the Center for Strategic and International Studies.In participating regions, you'll also hear a local news segment to help you make sense of what's going on in your community.Email us at considerthis@npr.org.