In Los Angeles, California police and sheriffs' departments are providing extra security to high-profile locations, including public transit, government buildings and shopping centers -- places where ... more 
In Los Angeles, California police and sheriffs' departments are providing extra security to high-profile locations, including public transit, government buildings and shopping centers -- places where crowds might gather. Bill Whitaker reports. less 
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Mon, Apr 15, 2013 9:12 PM EDT