FILE - In this file photo taken Thursday, Feb. 16, 2012, Chinese Vice President Xi Jinping smiles as he enters his vehicle after a visit to the Rick Kimberley family farm, in Maxwell, Iowa. Xi, 59 and the country's vice president is expected to take over as head of the ruling party in November, 2012, before becoming president in 2013 of an increasingly assertive China. Tall and heavyset, married to a popular folk singer in the military, Xi is at ease in groups, in contrast to China's typically stiff and aloof leaders, such as current President Hu Jintao. (AP Photo/Charlie Neibergall, Pool, File)

Associated Press
FILE - In this file photo taken Thursday, Feb. 16, 2012, Chinese Vice President Xi Jinping smiles as he enters his vehicle after a visit to the Rick Kimberley family farm, in Maxwell, Iowa. Xi, 59 and the country's vice president is expected to take over as head of the ruling party in November, 2012, before becoming president in 2013 of an increasingly assertive China. Tall and heavyset, married to a popular folk singer in the military, Xi is at ease in groups, in contrast to China's typically stiff and aloof leaders, such as current President Hu Jintao. (AP Photo/Charlie Neibergall, Pool, File)
FILE - In this file photo taken Thursday, Feb. 16, 2012, Chinese Vice President Xi Jinping smiles as he enters his vehicle after a visit to the Rick Kimberley family farm, in Maxwell, Iowa. Xi, 59 and the country's vice president is expected to take over as head of the ruling party in November, 2012, before becoming president in 2013 of an increasingly assertive China. Tall and heavyset, married to a popular folk singer in the military, Xi is at ease in groups, in contrast to China's typically stiff and aloof leaders, such as current President Hu Jintao. (AP Photo/Charlie Neibergall, Pool, File)
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