Biden To Visit Asia Amid Heightened Tensions
Both Japan and China claim islands included in China's new air defense zone
US Vice-President Joe Biden plans to visit Asia in an effort to ease tension between China and its neighbours over disputed islands in the East China Sea, the White House has said.
Mr Biden will visit China, Japan and South Korea next week, officials said.
China has claimed an "air defence identification zone" over the islands, insisting that aircraft obey its rules or face "emergency defensive measures".
US Defence Secretary Chuck Hagel called the move "potentially destabilizing".