An Afghan boy lies on a plastic boat at the outdoor area of the abandoned former Athens international airport, were refugees and migrants found temporary shelter, in Athens, Greece, 23 August 2016. The United Nations high commissioner for refugees, Filippo Grandi, will start a three-day visit to Athens on Tuesday to assess the humanitarian needs of the refugees and migrants hosted in Greece and find ways to help the country tackle the issue. (Photo by Yannis Kolesidis/EPA)
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