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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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    Should US be under heightened terror alert?

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Should US be under heightened terror alert?

Our terror panel weighs in on whether the U.S. should be under greater concern after the market attack that killed nine in Germany.

Should US be under heightened terror alert?

Our terror panel weighs in on whether the U.S. should be under greater concern after the market attack that killed nine in Germany.