From The New York Times:
WASHINGTON — The Obama administration signaled Sunday that it was seeking a way to interdict, possibly with China’s help, North Korean sea and air shipments suspected of carrying weapons or nuclear technology.
The administration also said it was examining whether there was a legal basis to reverse former President George W. Bush’s decision last year to remove the North from a list of states that sponsor terrorism.
The reference to interdictions — preferably at ports or airfields in countries like China, but possibly involving riskier confrontations on the high seas — was made by Secretary of State Hillary Rodham Clinton. She was the administration’s highest-ranking official to talk publicly about such a potentially provocative step as a response to North Korea’s second nuclear test, conducted two weeks ago.
Read more ....
My Comment: China will not go along. As far as they are concerned .... the North Korean problem is (for the present) a South Korean/U.S./Japan affair. The Chinese will continue to be critical of North Korea, but they will also treat them with a ten foot pole.