Article Photos: Insider attacks on US troops concern Panetta



U.S. Secretary of Defense Leon Panetta, left, smiles with Japan's Defense Minister Satoshi Morimoto at the Ministry of Defense in Tokyo, Monday, Sept. 17, 2012. (AP Photo/Larry Downing, Pool)

U.S. Secretary of Defense Leon Panetta, left, smiles with Japan's Defense Minister Satoshi Morimoto at the Ministry of Defense in Tokyo, Monday, Sept. 17, 2012. (AP Photo/Larry Downing, Pool)