Migrants and refugees move a boulder on the train tracks in sign of protest as Greek police try to convince them to leave the railroad in the makeshift camp at the Greek-Macedonian border near the village of Idomeni, on April 18, 2016. According to statistics released on on April 8 by the International Organization of Migrants (IOM), more than 152,000 people have arrived in Greece by sea from Turkey since January 1, nearly three-quarters of whom were Syrians. / AFP / DANIEL MIHAILESCU (Photo credit should read DANIEL MIHAILESCU/AFP/Getty Images)
