China

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Chinese President Hu Jintao, left, and Vice President Joe Biden stand for the national anthems of both countries during an arrival ceremony on Tuesday, Jan. 18, 2011, at Andrews Air Force Base, Md. (AP Photo/Evan Vucci)

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President Obama and China's President Hu Jintao, during a state arrival ceremony on the South Lawn of the White House in Washington, Wednesday, Jan. 19, 2011. (AP Photo/Charles Dharapak)

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An honor guard stands at attention before a state arrival ceremony for Chinese President Hu Jintao, Wednesday, Jan. 19, 2011, on the South Lawn of the White House in Washington. (AP Photo/Charles Dharapak)

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Chinese President Hu Jintao and Vice President Joseph R. Biden Jr. walk the red carpet upon Mr. Hu's arrival Tuesday at Andrews Air Force Base, Md., for the start of a state visit. China's trade with Iran will be one of many thorny issues President Obama will likely raise with Mr. Hu. (Associated Press)

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Chinese President Hu Jintao, accompanied Vice President Biden, waves Tuesday during an arrival ceremony at Andrews Air Force Base, Md. (Associated Press)

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Chinese and U.S. flags were displayed Tuesday along Pennsylvania Avenue in Washington ahead of the arrival of Chinese President Hu Jintao for a state visit hosted by President Obama. (Associated Press)

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** FILE ** In this Sept. 24, 2009, file photo, President Barack Obama welcomes China's President Hu Jintao as he arrives for the G-20 summit dinner in Pittsburgh. (AP Photo/Charles Dharapak, File)

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** FILE ** In this Tuesday, Nov. 17, 2009, file photo, Chinese President Hu Jintao, right, gestures to U.S. President Barack Obama after a joint press conference where both read prepared statements and did not take any questions at the Great Hall of the People in Beijing, China. (AP Photo/Ng Han Guan, File)

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President George W. Bush welcomes Chinese President Hu Jintao in a South Lawn arrival ceremony in April 2006. Mr. Hu was disappointed to have lunch with the president instead of a state dinner. (Associated Press)

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Secretary of State Hillary Rodham Clinton speaks about China on Friday, Jan. 14, 2011, at the State Department in Washington. (AP Photo/Charles Dharapak)

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Secretary of State Hillary Rodham Clinton speaks about China, Friday, Jan. 14, 2011, at the State Department in Washington. (AP Photo/Charles Dharapak)

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Chinese paramilitary policemen stand guard near Tiananmen Square in Beijing, China's capital. (Associated Press)

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Zhang Jie, 22, sits in the recovery room Dec. 13 after her second abortion in two years at a clinic in Xi'an, China. While exact numbers are hard to come by, official figures show abortions are increasing, and experts say many of the abortion-seekers are young, single women. (Associated Press)