U.S. Secretary of Defense Leon Panetta addresses cadets at the Engineering Academy of PLA Armored Forces, in Beijing, Wednesday, Sept. 19, 2012. (AP Photo/Larry Downing, Pool)

Associated Press
U.S. Secretary of Defense Leon Panetta addresses cadets at the Engineering Academy of PLA Armored Forces, in Beijing, Wednesday, Sept. 19, 2012. (AP Photo/Larry Downing, Pool)
U.S. Secretary of Defense Leon Panetta addresses cadets at the Engineering Academy of PLA Armored Forces, in Beijing, Wednesday, Sept. 19, 2012. (AP Photo/Larry Downing, Pool)
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