Tuesday a few B-52's, from Anderson AFB in Guam, flew into Chinese airspace near the East China Sea. The friction lately between Japan and China might be the reason why. That's my theory anyway.
China and Japan has had a long time dispute over islands in the East China Sea. Both countries claiming ownership of these islands. Some speculate this could actually cause war between the two. However there was no aerial response from China.
With rumors of war looming this could be the flashpoint for that (Pacific) region. Interesting to note the current turmoil in the Middle East and the peace talks recently held in Geneva concerning Iran.
Link below for article from Newsmax:
US B-52's Fly In Chinese Fly Zone