US army chief begins China visit

Admiral Mike Mullen, chairman of the US Joint Chiefs of Staff, sits on a chair before delivering a speech at the Renmin University in Beijing July 10, 2011. Mullen, the top US military officer, began a four-day trip to China. Mullen is visiting Beijing at the invitation of his counterpart, General Chen Bingde, chief of the general staff of the People's Liberation Army, who visited Washington earlier this year.[Photo/Agencies]

Admiral Mike Mullen, chairman of the US Joint Chiefs of Staff, answers a question from the audience after he delivered a speech at the Renmin University in Beijing July 10, 2011.[Photo/Agencies]

Admiral Mike Mullen, chairman of the US Joint Chiefs of Staff, sits on a chair before delivering a speech at the Renmin University in Beijing July 10, 2011.[Photo/Agencies]