The Korean situation differs somewhat because Pyongyang is superimposing a new strategic layer atop the existing Pacific triangle of China, Russia and the United States. In reaction to the centrifuge report, Seoul jumped the gun by calling for the reintroduction of tactical nuclear weapons on its territory after a lapse of 19 years. After the recent artillery exchange, Seoul retracted its threat.
As the mirage of a non-nuclear Korean Peninsula dissipates, the prospect of an East Asian nuclear triangle beckons Japan. Though Asians will voice strong objections, Tokyo may soon have to walk out from under the American nuclear umbrella and into the hard rain, just as Tel Aviv and Tehran have done. The superpower era is over, and so a multipolar world for its own security must create a new architecture of nuclear terror.