>>The reason he doesn't invade is because it could very easily involve China and Japan and precipitate a global war.<<

Probably more like he can't. He already yanked about half the troops that were serving in Korea and sent them to Iraq some time ago. He can't go yanking them back again and he has no replacements because he is running the military into the ground. We're all bark and no bite and Kim Jong Il knows it. The Cowboy War President is running out of ammo.