Refugees and migrants pull a wagon in an attempt to go through a barricade held by Greek police as they protest to call for the reopening of the border near their makeshift camp in the northern border village of Idomeni, on April 11, 2016. A plan to send back migrants from Greece to Turkey sparked demonstrations by local residents in both countries days before the deal brokered by the European Union is set to be implemented. (Bluent Kilic/AFP/Getty Images)