Hungarian policemen detain a Syrian migrant family after they entered Hungary at the border with Serbia, near Roszke, August 28, 2015. (Photo by Bernadett Szabo/Reuters)





A long exposure photo shows thousands of lifejackets left by migrants and refugees, piled up at a garbage dump site on the Greek island of Lesbos, November 9, 2015. (Photo by Alkis Konstantinidis/Reuters)





Four-year-old Rashida from Kobani, Syria, part of a new group of more than a thousand immigrants, sleeps as they wait at border line of Macedonia and Greece to enter into Macedonia near Gevgelija railway station August 20, 2015. (Photo by Ognen Teofilovski/Reuters)





An Afghan boy dries his shoes at a open fire outside a temporary UNHCR camp on the Greek island of Lesbos October 20, 2015. (Photo by Yannis Behrakis/Reuters)





A migrant from Syria carries her child as she walks through a field in the village of Miratovac near the town of Presevo, Serbia August 24, 2015. (Photo by Marko Djurica/Reuters)





A woman from Syria looks on as she waits to cross the border with Croatia near the village of Berkasovo, Serbia, October 21, 2015. (Photo by Marko Djurica/Reuters)





People carry the body of a dead migrant from a merchant ship as they arrive in the Sicilian harbour of Catania, southern Italy, May 5, 2015. (Photo by Antonio Parrinello/Reuters)





Shadows from migrants are cast on a makeshift shelter with the written word “Refugee” in Calais, France April 30, 2015. (Photo by Pascal Rossignol/Reuters)





A migrant child leans out of a train window to collect food at the railway station in Tovarnik, Croatia September 29, 2015. (Photo by Antonio Bronic/Reuters)





A migrant woman carries her child after arriving at a rocky beach on the Greek island of Lesbos after crossing a part of the Aegean Sea from the Turkish coast to Lesbos October 11, 2015. (Photo by Fotis Plegas G./Reuters)





A migrant family from Syria walks along rail tracks as they arrive to a collection point in the village of Roszke in Hungary after crossing the border from Serbia, September 6, 2015. (Photo by Marko Djurica/Reuters)





Yasmine, a 6-year-old migrant from Deir Al Zour in war-torn Syria, cries at the beach after arriving on the Greek island of Lesbos September 11, 2015. Yasmine said that the men who brought her family across the narrow sea between Bodrum in Turkey and this Greek tourist island threw away the dress her grandmother gave her. (Photo by Zohra Bensemra/Reuters)





A migrant washes as the passenger ship “Eleftherios Venizelos” leaves the port on the Greek island of Kos, August 19, 2015. (Photo by Alkis Konstantinidis/Reuters)





A policeman tries to stop a migrant from boarding a train through a window at Gevgelija train station in Macedonia, close to the border with Greece, August 15, 2015. (Photo by Stoyan Nenov/Reuters)





Migrants' tents are blown off by the wind near a collection point in the village of Roszke, Hungary September 9, 2015. (Photo by Marko Djurica/Reuters)





A Dutch volunteer tries to comfort a migrant moments after arriving aboard a raft at a beach on the Greek island of Lesbos October 23, 2015. (Photo by Yannis Behrakis/Reuters)





A refugee keeps warm by an open fire at a make-shift camp close to a registration center on the Greek island of Lesbos November 18, 2015. (Photo by Yannis Behrakis/Reuters)





An Iranian migrant cries next to his son and wife moments after a small group of exhausted migrants from Iran arrive by paddling an engineless dinghy from the Turkish coast (seen in the background) at a beach on the Greek island of Kos August 15, 2015. (Photo by Yannis Behrakis/Reuters)





Faris, from Sudan, learns French at "The New Jungle" camp in Calais, France, August 8, 2015. (Photo by Juan Medina/Reuters)





A young girl carries a doll as she and other migrants make their way after crossing the border from Macedonia, at Miratovac, Serbia October 15, 2015. (Photo by Marko Djurica/Reuters)





A Syrian refugee child is covered by thermal blanket in the port of Kos following a rescue mission off the Greek island August 10, 2015. (Photo by Yannis Behrakis/Reuters)





A migrant carrying a child falls after tripping on TV camerawoman (R) Petra Laszlo while trying to escape from a collection point in Roszke village, Hungary, September 8, 2015. (Photo by Marko Djurica/Reuters)





Hungarian policemen stand by the family of migrants as they wanted to run away at the railway station in the town of Bicske, Hungary, September 3, 2015. (Photo by Laszlo Balogh/Reuters)





An immigrant from Mali rests at the Greek-Macedonian border before an attempt to flee to Macedonia village of Idomeni in Kilkis prefecture May 13, 2015. (Photo by Yannis Behrakis/Reuters)





Migrants run after crossing a fence as they attempt to access the Channel Tunnel in Frethun, near Calais, France, August 4, 2015. (Photo by Juan Medina/Reuters)





A Syrian refugee reacts as he waits behind border fences to cross into Turkey at Akcakale border gate in Sanliurfa province, Turkey, June 15, 2015. (Photo by Umit Bektas/Reuters)





A Macedonian riot policeman stands guard as a Syrian refugee woman sits behind barbed-wire at the Greek-Macedonian border, near the village of Idomeni, August 21, 2015. (Photo by Yannis Behrakis/Reuters)





A refugee prepares to hand over a toddler to a volunteer lifeguard as a half-sunken catamaran carrying around 150 refugees, most of them Syrians, arrives after crossing part of the Aegean sea from Turkey on the Greek island of Lesbos, October 30, 2015. (Photo by Giorgos Moutafis/Reuters)





A migrant from Syria walks along rail tracks with his son as they arrive to a collection point in the village of Roszke in Hungary after crossing the border from Serbia, September 6, 2015. (Photo by Marko Djurica/Reuters)





A Frontex helicopter stops a dinghy with a suspected smuggler off the Greek island of Lesbos September 24, 2015. (Photo by Yannis Behrakis/Reuters)





A girl cries after crossing Greece's border into Macedonia near Gevgelija, Macedonia, August 22, 2015. (Photo by Ognen Teofilovski/Reuters)





A Syrian refugee child screams inside an overcrowded dinghy after crossing part of the Aegean Sea from Turkey to the Greek island of Lesbos September 23, 2015. (Photo by Yannis Behrakis/Reuters)





Migrants jostle for positions to board a train as ticket control rules now mandate each passenger to have allocated seats on trains bound for the West from Budapest, Hungary, on August 31, 2015. (Photo by Bernadett Szabo/Reuters)





An Afghan mother comforts her crying child moments after a dinghy carrying Afghan migrants arrived on the island of Lesbos, Greece August 23, 2015. (Photo by Alkis Konstantinidis/Reuters)





Volunteer doctors and paramedics try to revive a baby after a boat carrying more than 200 refugees and migrants sunk while crossing part of the Aegean sea from Turkey, on the Greek island of Lesbos, October 28, 2015. (Photo by Giorgos Moutafis/Reuters)





Migrants and refugees wait to cross Greece's border with Macedonia, near the Greek village of Idomeni, September 7, 2015. (Photo by Yannis Behrakis/Reuters)





A migrant prays at sunrise on the rocks of the seawall at the Saint Ludovic border crossing on the Mediterranean Sea between Vintimille, Italy and Menton, France, June 17, 2015. (Photo by Eric Gaillard/Reuters)





Syrian migrants cross under a fence as they enter Hungary at the border with Serbia, near Roszke, August 27, 2015. (Photo by Bernadett Szabo/Reuters)