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Photo by: Koji Sasahara

U.S. Vice President Joe Biden shakes hands with Japanese Prime Minister Shinzo Abe at the end of a joint press conference following their meeting at Abe's official residence in Tokyo Tuesday, Dec. 3, 2013. Biden voiced strong opposition Tuesday to China's new air defense zone above a set of disputed islands, showing a united front with an anxious Japan as tension in the region simmered. Standing side by side in Tokyo with Abe, Biden said the U.S. is "deeply concerned" about China's attempt to unilaterally change the status quo in the East China Sea. (AP Photo/Koji Sasahara)

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