The third crisis is unfolding over the East China Sea, where, in open challenge to Obama’s “pivot to Asia,” China has brazenly declared a huge expansion of its airspace into waters claimed by Japan and South Korea.

Obama’s first response — sending B-52s through that airspace without acknowledging the Chinese — was quick and firm. Japan and South Korea followed suit. But when Japan then told its civilian carriers not to comply with Chinese demands for identification, the State Department (and FAA) told U.S. air carriers to submit.

Which, of course, left the Japanese hanging. It got worse. During Vice President Biden’s visit to China, the administration buckled. Rather than insisting on a withdrawal of China’s outrageous claim, we began urging mere nonenforcement.

Again leaving our friends stunned. They need an ally, not an intermediary. Here is the U.S. again going over the heads of allies to accommodate a common adversary. We should be declaring the Chinese claim null and void, ordering our commercial airlines to join Japan in acting accordingly, and supplying them with joint military escorts if necessary.