In this Dec. 5, 2010 file photo released by U.S. Navy, USNS Tippecanoe, center, refuels Japan Maritime Self-Defense Force Escort Flotilla ships Ikazuchi, right, and Kongo during a joint military exercise in the Pacific Ocean.
China's first lunar rover separates from Chang'e-3 moon lander early Dec. 15, 2013. This picture was taken from the screen of the Beijing Aerospace Control Center in Beijing, capital of China.
Li Xin /Xinhua /Landov
Vice President Joe Biden speaks after a welcoming ceremony at the Great Hall of the People in Beijing Wednesday. Biden met with China's president to discuss issues that include China's recent claim of an air defense zone.
Lintao Zhang/Getty Images
The Long March-3B carrier rocket carrying China's Chang'e-3 lunar probe blasts off from the launch pad at Xichang Satellite Launch Center in southwest China's Sichuan Province on Monday.
Li Gang /Xinhua /Landov
Japanese Coast Guard vessels sail alongside Japanese activists' fishing boat, not in photo, warning the activists away from a group of disputed islands called Diaoyu by China and Senkaku by Japan.