How to deal with North Korea

Pyongyang's belligerent behavior should not obscure other dramatic conciliatory steps North Korea has taken in recent years-steps suggesting that, even now, a solution lies within reach. The trick is to craft a plan that does not reward the North for its misdeeds. In such a plan, all major outside powers should guarantee the security of the entire Korean Peninsula first. This will remove Pyongyang's excuse for nuclear proliferation-and break the deadlock on the world's last Cold War frontier.