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Refugees and immigrants at the former Athens international airport. About 3.500 people live at the premises of the old airport under hard conditions in southern Athens, June 9, 2016 (Photo by Giorgos Georgiou/NurPhoto via Getty Images)

Refugees and immigrants at the former Athens international airport. About 3.500 people live at the premises of the old airport under hard conditions in southern Athens, June 9, 2016 (Photo by Giorgos Georgiou/NurPhoto via Getty Images)