Chinese President Hu Jintao speaks during a luncheon for corporate and policy leaders co-hosted by the U.S.-China Business Council and the National Committee on U.S.-China Relations in Washington on Thursday, at the end of his visit to the U.S. capital. Saul Loeb/AFP/Getty Images hide caption

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U.S. Defense Secretary Robert Gates and Gen. Xu Caihou, vice chairman of China's Central Military Commission, meet in Beijing on Tuesday. Gates is holding talks with China's political and military leaders during the visit, which comes ahead of a second summit between President Obama and China's President Hu Jintao later this month. Pool/Getty Images hide caption

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Richard Holbrooke, U.S. special representative to Afghanistan and Pakistan, takes part in a discussion on international security in Passau, Germany, on Nov. 12. hide caption

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South Korean Gen. Han Min-koo looks at houses destroyed by North Korea's Nov. 23 shelling of Yeonpyeong Island. Two weeks after the attack, the rivals are still trading threats, while tensions are also rising between South Korea's ally, the U.S., and China, an ally of North Korea. Kim Ju-sung/AP/Yonhap hide caption

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U.S. ambassador to Afghanistan Karl Eikenberry. Shah Marai/AFP/Getty Images hide caption

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Afghan President Hamid Karzai. Sean Gallup/Getty Images hide caption

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