Here is one reason why we do not have to fear NKorea

http://www.telegraph.co.uk/news/worldnews/asia/northkorea/9826125/Google-Earth-exposes-North-Koreas-secret-prison-camps.html

If they ever invaded SK, there would be massive insurrection in their country.

Well since an army moves on it's stomach I don't think North Korea is gonna get very far...If they do attack just set up some picnic tables and a good barbecue and the North's army will surrender just to get a decent meal....deplorable what these little "god" dictators do to their people.