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BERLIN, GERMANY - DECEMBER 20:  German Chancellor Angela Merkel arrives to give a statement the day after a man drove a truck into a crowded Christmas market on December 20, 2016 in Berlin, Germany. The man, whom police apprehended and have identified as a Pakistani national, drove the heavy truck into the Christmas market in the city center, killing 12 people and injuring 48.  (Photo by Sean Gallup/Getty Images)
BERLIN, GERMANY - DECEMBER 20:  German Chancellor Angela Merkel arrives to give a statement the day after a man drove a truck into a crowded Christmas market on December 20, 2016 in Berlin, Germany. The man, whom police apprehended and have identified as a Pakistani national, drove the heavy truck into the Christmas market in the city center, killing 12 people and injuring 48.  (Photo by Sean Gallup/Getty Images)

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Rivals blame German policies for Berlin attack

CNN's Amara Walker talks with Berlin-based journalist Matthew Karnitschnig about how Monday's attack on a Christmas market in Berlin will affect German Chancellor Angela Merkel's re-election bid.

Rivals blame German policies for Berlin attack

CNN's Amara Walker talks with Berlin-based journalist Matthew Karnitschnig about how Monday's attack on a Christmas market in Berlin will affect German Chancellor Angela Merkel's re-election bid.