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Police guard a Christmas market after a truck ran into the crowded Christmas market in Berliin Berlin, Germany, Monday, Dec. 19, 2016.
Police guard a Christmas market after a truck ran into the crowded Christmas market in Berliin Berlin, Germany, Monday, Dec. 19, 2016.

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    Official: European threat scale "unprecedented"

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Official: European threat scale "unprecedented"

Intelligence officials have been concerned about growing terror threats across Europe. CNN's Max Foster reports.

Official: European threat scale "unprecedented"

Intelligence officials have been concerned about growing terror threats across Europe. CNN's Max Foster reports.