A migrant sits outside of his tent at the premises of the disused Hellenikon airport, where refugees and migrants are temporarily housed in Athens July 31, 2016.

The Vasilika refugee camp is a military-run refugee camp located in an old warehouse in Vasilika village near central Macedonia, Greece, July 11, 2016.

Syrian refugee children take part in activities organized by the non-profit "Beyond Association" in Saadnayel, Lebanon, July 16, 2016.

The Vasilika refugee camp is a military-run refugee camp located in an old warehouse in Vasilika village, Greece, July 11, 2016.

Syrian refugees are seen in Suruc district of Sanliurfa, Turkey, July 1, 2016, as the Syrian people who fled the clashes between Daesh and Kurdish armed groups about two years ago, make preparations for the Eid al-Fitr which marks the end of the Muslim holy fasting month of Ramadan by preparing sweets.

Children play in the courtyard of an abandoned school used by volunteers for hosting Syrian and Afghan refugees in Athens, July 1, 2016.

A Syrian woman in a food line at the refugee camp near Idomeni, Greece, at the border with Macedonia, May 10, 2016. She holds a 9-day-old baby who was born in the camp. About 54,000 migrants are currently stranded in Greece, and 10,000 are at the Idomeni camp. The European Union and Turkey have reached a deal designed to stem the flow of refugees and migrants to Europe.

Syrian refugee boys fly a kite in a Syrian refugee camp in the Bekaa Valley, Lebanon, May 17, 2016.

<p> Farah Sheikh Ahmed,&nbsp;19, from&nbsp;Idlib, Syria, with her daughter, Maram, in a tent made of blankets given by the UNCHR, the United Nations refugee agency, at the&nbsp;Idomeni camp,&nbsp;May 14, 2016.&nbsp;Maram, the family's first child, was born April 20 at the hospital in the nearby town of Kilkis.&nbsp;Ahmed is one of dozens of stranded&nbsp;women who have given birth after the Greek-Macedonia border was closed in early March 2016.</p>

A 5-month-old Syrian baby sleeps inside a tent at &nbsp;the Idomeni camp, May 16, 2016.&nbsp;

Nasser Darwish, a young&nbsp;Syrian refugee, makes drawings to sell with his brother on Gemmayzeh Street in Beirut, the Lebanese capital,&nbsp;May 14, 2016.

A young Syrian refugee boy makes shoe parts in a Turkish owned factory on May 16, 2016 in Gaziantep, Turkey. Turkey's massive and largely unregulated garment industry is an attractive option for Syrians to work both legally and illegally despite low wages, long hours and poor conditions.

A refugee camp in Kilis, Turkey, a Turkish border city grappling with a population of Syrian refugees larger than its own, has high hopes for the first-ever World Humanitarian Summit slated for May 23-24, 2016 in Istanbul.

A Syrian refugee girl stands outside tents at a refugee camp in Osmaniye, Turkey, May 17, 2016.

Syrian refugees stroll at a refugee camp in Osmaniye, Turkey, May 17, 2016.

Syrian refugee children play with a wagonette at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, May 23, 2016.

A Syrian refugee toddler is seen outside of a refugee camp in Turkey's Syrian Border city Hatay's Kirikhan District, Feb. 16, 2016.

Refugees, aboard a train that would take them towards Serbia, look at Czech Republic police officers who maintain the order at the transit center for refugees, near the southern Macedonia's town of Gevgelija, Feb. 14, 2016.

Loula, 18, a Yemeni refugee and Mohammed, 20, a Palestinian refugee from Lebanon exchange rings during their engagement party at the center for refugees in Kofinou, Cyprus, Feb. 16, 2016.

Refugees walk towards the Serbia border from the transit center for refugees near northern Macedonian village of Tabanovce, Feb. 12, 2016.

An art installation by Chinese artist Ai Weiwei showcases thousands of used life vests by refugees from the Greek island of Lesbos, Feb. 14, 2016 in Berlin.

Afghan asylum seeker Roheek Yausofi waits his turn for food cooked on an open fire, with fish caught the day before by his father, on the island of Seiland, northern Norway, Feb. 2, 2016.

A view of a dormitory at the new relocation center for refugees and migrants in the western Athens' suburb of Schisto, Feb. 16, 2016.

A woman cries as Syrians fleeing the northern embattled city of Aleppo wait in Bab-Al Salama, next to the city of Azaz, northern Syria, near Turkish crossing gate, Feb. 5, 2016.

Syrians try to live inside a wrecked vehicle at a refugee camp at the Bab al-Salameh border crossing on Turkish-Syrian border near Azaz town of Aleppo, Syria, Feb. 9, 2016.

A man reflects while standing in front of graves in Mytilene, Greece, Feb. 17, 2016, at a graveyard for refugees and migrants who drowned in their attempt to cross the Aegean sea from Turkey to the island of Lesbos.

A refugee warms himself at a bonfire at the Turkish border crossing gate as Syrians fleeing the northern embattled city of Aleppo wait on Feb. 6, 2016 in Bab al-Salama, near the city of Azaz, northern Syria.

Refugee children are taught at a makeshift school in the "Jungle" camp in the port town of Calais, France, Feb. 16, 2016.

A view of the refugee camp in Hammerfest, northern Norway, is seen, Feb. 4, 2016.

Syrians, who fled the bombing in Aleppo, wait in line to get food at a tent city close to the Bab al-Salam border crossing on Turkish-Syrian border near Azaz town of Aleppo, Syria ,Feb.10, 2016.

A Syrian 2 year old baby Zehra and Eye Halip, who fled bombing in Aleppo, are seen with their mother Belkiz Halip at a tent city close to the Bab al-Salam border crossing on Turkish-Syrian border near Azaz town of Aleppo, Syria, Feb. 11, 2016.

Turkish humanitarian aid organization members distribute humanitarian aids for Syrians, who fled bombing in Aleppo at a tent city close to the Bab al-Salam border crossing on Turkish-Syrian border near Azaz town of Aleppo, Syria, Feb. 13, 2016.

A Syrian kid, who fled bombing in Aleppo, walks amid tents at a tent city close to the Bab al-Salam border crossing on Turkish-Syrian border near Azaz town of Aleppo, Syria, Feb.13, 2016.

Migrants and refugees board a train heading to Serbia from the Macedonian-Greek border near Gevgelija, Feb. 14, 2016.

Malakeh Jazmati (wearing headscarf), a Syrian refugee who used to have a cooking show on Syrian TV, and her husband Mohammad Alghamian show guests how to prepare a Syrian specialty at a cooking workshop in Berlin, Feb. 14, 2016.

Refugees sit on a table at a playground, Feb. 10, 2016, in Kladesholmen, Sweden.

Syrian refugees fled the Russian bombings in their country are seen in their shelter in Hatay, Turkey, Feb. 16, 2016.

Turkish Coast Guard personnel throw ropes at refugees who were holding onto buoys after toppling over a fishermen dinghy en route to Greece on Jan. 22, 2016 in Didim district of Aydin, Turkey. 4 refugees body including 3 children pulled out of the water as Turkish coast guard personnel rescued 43 others.

A man carries his child as they walk with other migrants and refugees after crossing the Macedonian border into Serbia near the village of Miratovac, Jan. 19, 2016.

A migrant carries a child as they walk through a frozen field after crossing the border from Macedonia, near the village of Miratovac, Serbia, Jan. 18, 2016.

An Afghan man sits in front of a burnt dismantled shelter in the camp known as the "Jungle", a squalid sprawling camp in Calais, northern France, Jan. 19, 2016.

Migrants and refugees walk along snow covered tracks after crossing the Macedonian border into Serbia, near the village of Miratovac, Jan. 18, 2016.

Bodies of the three children and a woman are buried after a boat carrying Afghan refugees sank off near the Ahmetce neighborhood of Ayvacik district in Canakkale, Turkey, Jan. 19, 2016.

Two young women from Afghanistan wait to be registered in the Tabakika registration center, Jan. 15, 2016.

A woman from Syria holds her baby as she rests on board a MOAS (Migrant Offshore Aid Station) ship after being rescued while attempting to reach the Greek island of Agathonisi, Dodecanese, southeastern Agean Sea, overnight on Jan. 16, 2016.

Ahmad Zarour, 32, from Syria, reacts after his rescue by MOAS (Migrant Offshore Aid Station) while attempting to reach the Greek island of Agathonisi, Dodecanese, southeastern Agean Sea, overnight on Jan. 16, 2016.

Syrian refugees, stuck between the Jordanian and Syrian borders, wait to cross into Jordan, at the Hadalat border crossing, east of the Jordanian capital Amman, Jan.14, 2016.

Graves of the refugees, who fled the war in their countries and died in the Aegean sea on their way to Europe, are seen at the common grave near the World Peace Monument in Izmir, Turkey, Jan. 14, 2016.

A refugee walks in a camp in Grande-Synthe near Dunkirk, northern France, Jan. 12, 2016.

A refugee walks after crossing the Macedonian border into Serbia near the village of Miratovac, Jan.10, 2016.

Migrants and Refugees walk to a transit camp after they landed on a rubber boat on the shores of Lesbos on Jan.5, 2015 near Skala Sikaminias, Greece.

A volunteer sorts out orange life jackets from a huge pile as MSF / Doctors Without Borders and Greenpeace set up a giant peace symbol made of life vests (not pictured) used by refugees in Lesbos near Molivos, Greece, Jan. 1, 2016.

Syrian refugee women queue for food aid in Ankara, Turkey, Dec. 22, 2015.

Children at a migrant shelter stand in line to receive presents from a volunteer dressed as Santa Claus, Dec. 14, 2015 in Berlin.

A member of the Turkish Coast Guard pulls an inflatable dinghy transporting Syrian migrants attempting to reach the Greek island of Chios, in the Agean Sea near Izmir in the night, Dec.10, 2015.

Refugees and migrants embark on a ferry after arriving from Turkey, Dec. 8, 2015, at the port of Mytiline in Lesbos.

A group of migrants and refugees wait to cross the Greek-Macedonian border near the village of Idomeni, Dec. 6, 2015.

Migrants and refugees wait to cross the Greek-Macedonian border near the town of Gevgelija, Dec. 4, 2015.

Refugees wait to cross the Greek-Macedonian border as policemen from both sides stand guard, near the northern Greek village of Idomeni, Dec. 3, 2015.

Members of several Afghan families try to warm up next to a bonfire outside a processing center in Moria village on the northeastern Greek island of Lesbos, Dec. 3, 2015.

A refugee keeps warm by a fire in a camp, Dec. 1, 2015, in Calais, France.

Refugees collect wood as they contend with wintery conditions in a camp, Dec. 1, 2015, in Calais, France.

Refugees make warm drinks on an open fire as they contend with wintery conditions in a camp, Dec. 1, 2015, in Calais, France.

Refugees collect wood as they contend with wintery conditions in the camp, Dec. 1, 2015, in Calais, France.

Refugees wait in the snow in front of a heated tent at the Austrian-German border hear Hanging, Austria, Nov. 22, 2015.

An asylum seeker carrying her baby waits to enter Germany during a snow shower at the German-Austrian border near Hanging, Austria, Nov. 21, 2015. The start of winter is also affecting the refugees in the border region.

A Syrian refugee family, who fled the civil war in their country, sit on the floor in their tent in Van, Turkey, Nov. 16, 2015. As the weather cools down in the Eastern Anatolia Region of Turkey, Syrian refugees has begun making preparations for winter in their makeshift houses.

A refugee waits for transport to Slovenia after he registered at a new winter refugee camp in Slavonski Brod, Croatia, Nov. 3, 2015.

A girl reacts after receiving tear gas during clashes between refugees and Hungarian police at the border with Serbia near the town of Horgos on Sept. 16, 2015.

A refugee girl is overcome by tear gas after Hungarian police repelled an attempt to break the border post gate and pull down the razor wire fence on Sept. 16, 2015 in Horgos, Serbia.

Migrants run as Hungarian riot police fires tear gas and water cannon at the border crossing with Serbia in Roszke, Hungary, Sept. 16, 2015. Hungarian police fired tear gas and water cannon at protesting migrants demanding they be allowed to enter from Serbia on the second day of a border crackdown

A man stands in the road as Hungarian riot police use a water cannon to push back refugees at the Hungarian border with Serbia on Sept. 16, 2015.

Hungarian police use pepper spray at the "Horgos 2" border crossing into Hungary, near Horgos, Serbia, Sept. 16, 2015.

Hungarian police use pepper spray against refugees at the Horgos border after Hungarian authorities closed their border on Sept. 16, 2015 in Horgos, Serbia.

Hungarian riot policemen run as they are deployed at the border crossing with Serbia in Roszke, Hungary Sept. 16, 2015. Hungarian riot police, backed by water cannon and armoured vehicles, moved into position at a border crossing on Wednesday where migrants were demanding they be allowed to cross from Serbia, a U.N. official at the scene told Reuters.

Refugees stand behind a fence at the Hungarian border with Serbia near the town of Horgos on Sept. 16, 2015.

Migrants shout slogans as they stand in front of a barrier at the border with Hungary near the village of Horgos, Serbia, Sept. 16, 2015.

This picture taken by a drone shows stranded refugees at the border station between Serbia and Hungary near Horgos, Serbia, early Sept. 16, 2015. Later in the day, refugees clashed with police who used tear gas and a water cannon to disperse the crowd.

Children of refugees sleep at the Hungarian border with Serbia near the town of Horgos on Sept. 16, 2015.

Refugees walk near Horgos, Serbia, near the border station between Serbia and Hungary, Sept. 16, 2015.

A migrant sits on the ground arrested by Hungarian authorities after he tried to cross the border between Serbia and Hungary in Roszke, Hungary, Sept. 15, 2015.

Refugees walk along a barbed wire barrier a the border of Hungary and Serbia, near Roszke, Hungary, Sept. 14, 2015.

Hungarian police officers guard the area as a rail wagon adorned with barbwire arrives to seal the border fence between Serbia and Hungary in Roszke, southern Hungary, Sept. 14, 2015.

Police register refugees at a train station on Sept. 14, 2015 in Freilassing, Germany.

Britain's Prime Minister David Cameron meets Syrian refugee families at a tented settlement camp in the Bekaa Valley on the Lebanese-Syrian border, Sept. 14, 2015.

Pictograms and Arab writing on a makeshift sign show the way to a rest area and medical treatment in an emergency shelter for refugees on Sept. 14, 2015 at the railway station in Salzburg, Austria.

Hungarian police officals stand guard at the border line between Hungary and Serbia near Roszke on Sept. 14, 2015 as the border fence with Serbia was closed by Hungarian police.

Refugees walk along a railway track at the Hungary-Serbia border, near the town of Horgos, on Sept. 14, 2015.

Police try to stop refugees that are leaving Nickelsdorf, Austria at the border with Hungary, Sept. 14, 2015.

A German Federal Police officer holds a stop sign to control vehicles coming from Austria, at the Austrian-German border, Sept. 14, 2015. Honking cars with stressed drivers banked up for miles at the Austrian-German road crossing, hours after Berlin reimposed border checks to control a massive refugee influx.

Refugees queue to board a train at the railway station in Roszke, Hungary, on Sept. 14, 2015.

Refugees gather on a platform at the railway station on Sept. 14, 2015 in Salzburg, Austria.

In this Sept. 13, 2015 photo taken with slow shutter speed, migrants walk towards a checkpoint along railway tracks near Roszke, near the border between Hungary and Serbia.

Refugee children wait near a registration camp in the southern Serbian town of Presevo, Sept. 11, 2015.

Refugees queue at a registration camp in the southern Serbian town of Presevo, Sept. 11, 2015.

A refugee woman waits inside of a tent near a registration camp in the southern Serbian town of Presevo, Sept. 11, 2015.

A refugee helps his daughter to run at the railway track after he crossed the Serbian-Hungarian border near Roszke, southern Hungary, Sept. 11, 2015.

Refugees queue at a registration camp in the southern Serbian town of Presevo, Sept. 11, 2015.

A mother breastfeeds her baby in front of piles of rubbish at a migrant collection point in Roszke, Hungary, Sept. 11, 2015.

A family waits in the rain for transportation away from a transit area close to the Serbian border to a refugee camp at dawn on Sept. 10, 2015 in Roszke, Hungary.

A man from Syria displays his temporary residency permit at a home for refugees in Hohenmoelsen, Germany on Sept. 10, 2015.

Migrants and refugees arrive by dinghy behind a huge pile of life vests after crossing from Turkey to the island of Lesbos Greece, Sept. 10, 2015.

Syrian refugees stand outside their tents at a refugee camp in the town of Deir Zanoun, Bekaa Valley, Lebanon, Sept. 10, 2015. The UNHCR has said there are about 1,150,000 Syrian refugees registered in Lebanon, equal to a quarter of Lebanon's population of 4.5 million. Beirut estimates there are another 500,000 unregistered Syrians in the country.

A woman cries as she crawls through a block of border police in the southern Macedonian town of Gevgelija, Sept. 10, 2015.

Macedonian border police help refugees and migrants to pass from the northern Greek village of Idomeni to southern Macedonia, Sept. 10, 2015. Thousands of people braved torrential downpours to cross Greece's northern border with Macedonia early Thursday.

Refugees beg Macedonian policemen to allow passage to cross the border from Greece into Macedonia during a rainstorm, near the Greek village of Idomeni, Sept. 10, 2015.

Refugees from Syria and Iraq take selfies with German Chancellor Angela Merkel outside a camp near the Federal Office for Migration and Refugees in Berlin, Sept. 10, 2015.

A woman and her baby wait for a bus that will take them to the center for asylum seekers near Roszke, southern Hungary, Sept. 10, 2015.

Migrants and refugees protect themselves under sheeting from the rain as they wait to cross the Greek-Macedonian border near the village of Idomeni, in northern Greece, Sept. 10, 2015.

A refugee child stands in an Athens central square where hundreds of mainly Afghani refugees have found temporary shelter without running water or toilets, Sept. 10, 2015.

Refugees sleep in a central square in Athens where hundreds of mainly Afghani refugees have found temporary shelter, Sept. 10, 2015.

Refugee children sit under covers as they wait near a registration camp in the town of Presevo after their arrival in Serbia, on Sept. 10, 2015.

A refugee holds a map at the railway station in Malmoe, southern Sweden, on Sept. 10, 2015. Sweden has become a top EU destination for refugees by issuing permanent residency to Syrian asylum seekers.

Syrian refugees queue to apply for immigration outside the German Embassy on the northern outskirts of Beirut, Sept. 10, 2015.

Syrian refugees queue to apply for immigration outside the German Embassy on the northern outskirts of Beirut, Sept. 10, 2015.

A man reacts after Hungarian police officers stop a group of refugees near a makeshift camp for asylum seekers in Roszke, southern Hungary, Sept. 9, 2015.

Hungarian police officers stop a group of refugees near a makeshift camp for asylum seekers in Roszke, southern Hungary, Sept. 9, 2015.

A refugee sleeps with her children on a ferry traveling from the northeastern Greek island of Lesbos to the Athens port of Piraeus, Sept. 9, 2015.

Refugees and migrants recharge the batteries on their mobile phones, while on a ferry traveling from the northeastern Greek island of Lesbos to the Athens port of Piraeus, Sept. 9, 2015.

A woman cries as she is embraced by a relative upon their arrival on the shores of the Greek island of Lesbos after crossing the Aegean Sea from Turkey on a dinghy, Sept. 9, 2015.

Omer from Syria carries his cat Johnny on his shoulders at a collection point for refugees in the village of Roszke, Hungary, Sept. 9, 2015.

A man cross the border into Hungary from Serbia as he walks over railroad tracks at dusk on Sept. 9, 2015 in Roszke, Serbia.

People help a refugee woman as she arrives on the shore of Eftalou beach, north of the port city of Mytilini after crossing the Aegean Sea from Turkey on September 09, 2015 in Lesbos Island, Greece.

Refugees are fed in a park near the port of Mytilini on Sept. 9, 2015 in Lesbos, Greece.

A refugee sleeps near the port of Mytilini on Sept. 9, 2015 in Lesbos, Greece.