In this Saturday, Feb. 28, 2015 photo West African migrants walk on train tracks on their way to the Greek-Macedonian border near the town of Evzonoi, Greece. (AP Photo/Dalton Bennett)
In this Saturday, Feb. 28, 2015 photo West African migrants walk on train tracks on their way to the Greek-Macedonian border near the town of Evzonoi, Greece. (AP Photo/Dalton Bennett)
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