CHINA BRIEFING U.S. Defense Secretary Robert M. Gates talks with the press on the Great Wall of China in Mutianyu, China, Jan. 12, 2011. Gates wrapped up a four-day trip to China by visiting the People's Liberation Army 2nd Artillery Group and the Great Wall. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 458548-B-UUB47-837.jpg Photo Gallery