U.S. President Barack Obama (L), Vice President Joe Biden (R)and State Secretary Hillary Clinton talk in the oval office of the White House in Washington, capital of the United States, March 12, 2009. [Zhang Yan/Xinhua]

U.S. President Barack Obama meets with Chinese Foreign Minister Yang Jiechi at White House in Washington D.C., capital of the United States, March 12, 2009. [Zhang Yan/Xinhua]