Liu Jianchao (second right), China's assistant foreign minister, shakes hands with Japanese Deputy Foreign Minister Shinsuke Sugiyama (second left) during a meeting in Tokyo, Japan on Thursday. Liu Tan/Xinhua/Landov hide caption

itoggle caption Liu Tan/Xinhua/Landov

Two U.S. B-52s, like the one shown here, have flown through an area that China says is within its air defense zone. China's announcement has irked its neighbors and the U.S. and Japan say they won't abide by it. Andy Rain /EPA/Landov hide caption

itoggle caption Andy Rain /EPA/Landov