A Libyan rebel grimaces on the frontline near Sultan, south of Benghazi, Libya, Friday, March 18, 2011. The U.N. Security Council voted Thursday to impose a no-fly zone over Libya and authorize "all necessary measures" to protect civilians from attacks by Moammar Gadhafi's forces, hours after the Libyan leader vowed to crush the rebellion with a final assault on the opposition capital of Benghazi. (AP Photo/Anja Niedringhaus)
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