A young boy looks over his father's shoulder, as they head to a train after arriving on a ferry carrying about 2,500 migrants from Greek islands to Greece's main port of Piraeus near Athens, on Thursday, Aug. 20, 2015. Greece has been overwhelmed this year by record numbers of migrants arriving on its eastern Aegean islands, with more than 160,000 arriving since January. (AP Photo/Petros Giannakouris)
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