epa05207985 Refugees stage a sit-in on rail tracks during a protest of migrants near their camp at the border between Greece and the Former Yugoslav Republic of Macedonia (FYROM), near Idomeni, Greece, 12 March 2016. After Slovenia, Croatia, Serbia and Macedonia have sealed their borders to the migration flow, tens of thousands of people are left stranded in Greece, where most migrants enter the European Union to continue on to countries in western and northern Europe. EPA/NAKE BATEV