Vice President Joseph R. Biden Jr. greets Chinese Vice Premier Wang Qishan during the opening session of the U.S.-China Strategic and Economic Dialogue (S&ED) on Monday, May 9, 2011, at the Interior Department in Washington. (AP Photo/Susan Walsh)

Photo by: Susan Walsh

Vice President Joseph R. Biden Jr. greets Chinese Vice Premier Wang Qishan during the opening session of the U.S.-China Strategic and Economic Dialogue (S&ED) on Monday, May 9, 2011, at the Interior Department in Washington. (AP Photo/Susan Walsh)