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Migrants cross a border under the barbed fence near the village of Roszke on the Hungarian-Serbian border on August 28, 2015 . As Europe struggles with its worst migrant crisis since World War II, and Hungarian police has  so far this year intercepted some 141,500 migrants crossing into Hungary, mostly from neighboring Serbia.   AFP PHOTO / ATTILA KISBENEDEK        (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)
Migrants cross a border under the barbed fence near the village of Roszke on the Hungarian-Serbian border on August 28, 2015 . As Europe struggles with its worst migrant crisis since World War II, and Hungarian police has  so far this year intercepted some 141,500 migrants crossing into Hungary, mostly from neighboring Serbia.   AFP PHOTO / ATTILA KISBENEDEK        (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)

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    Walls, tensions on the rise in Europe

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Walls, tensions on the rise in Europe

As the fences go up across Europe, so to the political divisions in the EU. CNN's Atika Shubert reports.

Walls, tensions on the rise in Europe

As the fences go up across Europe, so to the political divisions in the EU. CNN's Atika Shubert reports.