The death of Kim Jong-il last December, and the appointment of his unknown and untested son Kim Jong-un as his successor, has left the world on the edge of its seat. This hour, we'll head to Seoul to gauge how South Koreans view the threat from the North. We'll look back at the history of America's relationship with the two Koreas. We'll hear from the negotiators who penned the 1994 agreement with North Korea that averted a nuclear crisis. And we'll talk to North Korean defectors about their reactions to the leadership change in the North.