FILE - This Tuesday, Feb. 19, 2013 file photo shows part of a wall of surveillance camera video in New York. When news came of a terror attack in Paris, the New York Police Department went on high alert: Officials mobilized heavily armed teams to guard sensitive spots around the city. Detectives combed intelligence for any sign of a threat or copycat crime. And officers were sent overseas to bring back lessons from the tragedy. (AP Photo/Mary Altaffer)
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