Now Playing

What Does N. Korea, 'The Impossible State,' Want?

North Korea is the most secretive country in the world: mysterious and menacing in its pursuit of nuclear weapons. Victor Cha, a former member of the National Security Council, has a new book, The Impossible State: North Korea, Past And Future. Host Scott Simon talks with Cha about this week's events on the Korean Peninsula.

Trouble listening? See our technical support page.