In this photo taken Nov. 16, 2012 and released by U.S. Navy, warships from left, the USS Tortuga, the USS John S. McCain and the JS Takanami, steam in formation with the USS George Wash

 

              In this photo taken Nov. 16, 2012 and released by U.S. Navy, warships from left, the USS Tortuga, the USS John S. McCain and the JS Takanami, steam in formation with the USS George Wash
In this photo taken Nov. 16, 2012 and released by U.S. Navy, warships from left, the USS Tortuga, the USS John S. McCain and the JS Takanami, steam in formation with the USS George Washington in East China Sea following the conclusion of Keen Sword, a U.S.-Japan biennial naval exercise to respond to a crisis in the Asia-Pacific region. As U.S. President Barack Obama tours Asia to push his year-old pivot to the Pacific policy, the big question on everybody's mind is how much of a role Washington, with its mighty military and immense diplomatic clout, can play in keeping the Pacific. Japan is Washington's most faithful security partner in the Pacific and it is the most pinched by China's rise. (AP Photo/U.S. Navy, Lt. Cmdr. Denver Applehans) EDITORIAL USE ONLY