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Open Image ModalAn explosion rocks Syrian city of Kobani during a reported suicide car bomb attack by the militants of Islamic State group on a People\'s Protection Unit position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, Oct. 20, 2014 in Sanliurfa province, Turkey. (credit:Gokhan Sahin via Getty Images)
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Open Image ModalA Syrian man walks amid destruction in the northern Syrian city of Aleppo on April 10, 2013. (credit:DIMITAR DILKOFF via Getty Images)
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Open Image ModalA man carries a young girl who was injured in a reported barrel-bomb attack by government forces on June 3, 2014, in Kallaseh district in the northern city of Aleppo. (credit:BARAA AL-HALABI via Getty Images)
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Open Image ModalA displaced Syrian child in a makeshift camp for Syrian refugees only miles from the on Nov. 12, 2013, in Majdal Anjar, Lebanon, only miles from the Syrian border. (credit:Spencer Platt via Getty Images)
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Open Image ModalSyrian government troops sit atop a tank as they drive past a damaged building in Mleiha on the outskirts of the capital Damascus on Aug. 15, 2014. (credit:LOUAI BESHARA via Getty Images)
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Open Image ModalA Syrian man holds a crying girl as he gestures following an air strike by government forces on the Sahour neighbourhood of the northern Syrian city of Aleppo on March 6, 2014. (credit:AFP via Getty Images)
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Open Image ModalA boy rides his cycles in the streets of the destroyed Syrian town of Kobane, also known as Ain al-Arab, Syria, on June 20, 2015. (credit:Ahmet Sik via Getty Images)
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Open Image ModalA picture taken on Oct.14, 2014, shows a large explosion allegedly hitting a Syrian army military outpost in the southern part of the city of Maarat al-Numan in the Idlib province. (credit:GHAITH OMRAN via Getty Images)
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Open Image ModalSyrian girls, carrying school bags provided by UNICEF, walk past the rubble of destroyed buildings on their way home from school on March 7, 2015, in al-Shaar neighborhood, in the rebel-held side of the northern Syrian city of Aleppo. (credit:ZEIN AL-RIFAI via Getty Images)
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Open Image ModalSyrian schoolchildren stand next to a pile of classroom desks as they attend school in the Syrian Kurdish town of Kobane, also known as Ain al-Arab, on March 25, 2015. (credit:YASIN AKGUL via Getty Images)
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Open Image ModalA Syrian Kurdish boy sits on a destroyed tank in the Syrian town of Kobane, also known as Ain al-Arab, on March 27, 2015. (credit:YASIN AKGUL via Getty Images)
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Open Image ModalA man is helping out a baby as refugees from Afghanistan and Syria disembark from in a life boat on the shores of Lesbos near Skala Sikaminias, Greece on Nov. 10, 2015. Lesbos, the Greek vacation island in the Aegean Sea between Turkey and Greece, faces massive refugee flows from the Middle East countries. (credit:Etienne De Malglaive via Getty Images)
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Open Image ModalA general view of a make-shift camp set up by mainly Syrian refugees at the Porte de Saint-Ouen in Paris, early on Oct. 2, 2015. (credit:JOEL SAGET via Getty Images)
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Open Image ModalLebanese forces walk at a burnt unofficial Syrian refugee camp in the Al-Marj area of Lebanon\'s eastern Bekaa Valley, after a fire ripped through it on June 1, 2015, killing a baby and injuring several others. (credit:STR via Getty Images)
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Open Image ModalA sick refugee is pulled while walking and waiting for a chance to cross the Serbian-Croatian border at the refugee camp of Bapska. (credit:Pacific Press via Getty Images)
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Open Image ModalA man rests as he waits with other migrants and refugees at a registration camp after crossing the Greece-Macedonia border near Gevgelija on Nov. 14, 2015. (credit:DIMITAR DILKOFF via Getty Images)
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Open Image ModalDoctors Without Borders staff assist a young girl in a wheelchair as she enters, along with other migrants and refugees, a registration camp after crossing the Greek-Macedonian border near Gevgelija on Nov. 12, 2015. (credit:ROBERT ATANASOVSKI via Getty Images)
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Open Image ModalA Syrian woman changes her child\'s diaper as migrants and refugees queue at a camp to register after crossing the Greek-Macedonian border near Gevgelija on Sept. 22, 2015. (credit:NIKOLAY DOYCHINOV via Getty Images)
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Open Image ModalResidents sit in a French class at the \"Jungle,\" a migrant and refugee camp in Calais, on Oct. 30, 2015. (credit:PHILIPPE HUGUEN via Getty Images)
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Open Image ModalSyrian migrants and refugees march along the highway toward the Turkish-Greek border at Edirne on Sept. 18, 2015. (credit:BULENT KILIC via Getty Images)
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Open Image ModalA photo taken on Nov. 5, 2015 shows the \"Jungle\" migrants camp in Calais. (credit:PHILIPPE HUGUEN via Getty Images)
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Open Image ModalA woman stands at the entrance of a tent in a makeshift camp in Grande-Synthe, France, on Oct. 20, 2015. (credit:PHILIPPE HUGUEN via Getty Images)
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Open Image ModalSyrian refugee kids, fled from their homes due to civil war in their homeland, play in Yayladagi YIBO camp in Hatay province of Turkey, on Oct. 25, 2015. (credit:Anadolu Agency via Getty Images)
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Open Image ModalA photo taken on Nov. 12, 2015, shows a view of part of the \"New Jungle\" migrant camp in Calais. (credit:DENIS CHARLET via Getty Images)