http://news.yahoo.com/s/nm/20061025/ts_nm/korea_north_war_dc If S. Korea joins sanctions, North Korea says it will wage war. From how I see it, it's just another empty threat. But, again, we'll need to do something to stop them before they get *too* powerful. Right now 1/3 of their country is military-trained, and they're spending so many resources on military they don't have electricity at night.
All they have to do is provide their nuclear weapon to Al Qaeda....that's the biggest threat as of now.