I think that Only China should deal with N. Korea;
First, they are the ones that have the real power over Pyongyang, second US has it's hands ties on Iran's nukes, which are far more dangeroues to the world, since it's led by the Madman Ahmadinejad.


http://search.japantimes.co.jp/cgi-bin/ed20061022a1.html China squeezes Pyongyang