Europe's migrant crisis in pictures
Europe's Migrant Crisis - Sept. 5, 2015

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Migrants arrive at the Hungarian-Austrian border in Nickelsdorf, Austria, Sept. 5, 2015.

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A polar bear enjoys a patch of artificial snow at Moscow zoo.

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A migrants carries a child as they arrive at the Hungarian-Austrian border in Nickelsdorf, Austria, Saturday, Sept. 5, 2015, where they came from Budapest as Austria in the early-morning hours said it and Germany would let them in.

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Migrants flash victory sign and thumb-up after arriving at the border station between Hegyeshalom, Hungary, and Nickelsdorf, Austria, Saturday morning Sept. 5, 2015.