...The Bush administration filed its answer two Septembers ago with the National Security Strategy, a 31-page document whose most famous word was "preemption." It said, "In an age where the enemies of civilization openly and actively seek the world's most destructive technologies, the United States cannot remain idle while dangers gather." Preemption now is wholly associated with the Iraq war. But whether to act preemptively again -- or not -- is almost certain to re-emerge over the next four years with another country that we know but cannot verify is building a nuclear weapon. Just this week in an interview...