U.S. gov't vows justice after embassy attack
About 50 U.S. Marines head to Libya after the attack
Published On: Sep 12 2012 12:49:03 PM EDT
Updated On: Sep 12 2012 12:24:25 PM EDT
The United States moved to increase embassy security around the world after the attack that killed the U.S. ambassador to Libya and three staffers Tuesday.
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