April 19, 2013

Police nationwide on alert, watching Boston closely

  • Posted: 4/21/2013
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With preparations underway for several large public events both in the U.S. and abroad, local law enforcement officials are stepping up security in the wake of the Boston Marathon bombings. Airports and other transportation hubs are also on heightened alert as more information becomes available about the suspect at-large. NBC s Tom Costello reports.

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