Migrants and refugees cross the Serbian-Croatian border in Berkasovo, near the northwestern Serbian town of Sid, on October 25, 2015. An unprecedented 670,000 people mainly fleeing conflict in Syria, Iraq and Afghanistan have flooded into Europe so far this year, in the biggest movement of its kind since World War II. More than 4,000 people arrived at the Berkasovo border overnight in less than 12 hours, police said.  AFP PHOTO / ELVIS BARUKCIC
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