A Serbian police officer gives instructions to migrants queuing to get registered at a refugee center in the southern Serbian town of Presevo, Wednesday, Oct. 7, 2015. Several Eastern European countries are cooperating on controlling the flow of migrants at the external borders of the European Union — a program a top Hungarian official said Tuesday could set an example for the rest of the 28-nation bloc.
Migrants arrive at the Macedonian-Greek border town Gevgelija in Macedonia, Wednesday, Oct. 7, 2015. (Zoltan Balogh/MTI via AP)
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