U.S. Secretary of Defense Leon E. Panetta greets members of the Libyan delegation on the tarmac during his arrival in Tripoli, Libya, on Saturday, Dec. 17, 2011. (AP Photo/Pablo Martinez Monsivais, Pool)
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U.S. Secretary of Defense Leon E. Panetta greets members of the Libyan delegation on the tarmac during his arrival in Tripoli, Libya, on Saturday, Dec. 17, 2011. (AP Photo/Pablo Martinez Monsivais, Pool)
