A protesting migrant walks amid teargas smoke on a field during clashes with Macedonian police next to a border fence at a makeshift camp for refugees and migrants at the Greek-Macedonian border near the village of Idomeni, Greece, April 10, 2016. REUTERS/Stoyan Nenov 

A girl sits next to tents at a makeshift camp for refugees and migrants at the port of Piraeus, near Athens, Greece April 6, 2016. REUTERS/Alkis Konstantinidis 

A migrant who will be returned to Turkey is seen behind a barbed wire fence inside the Moria registration centre on the Greek island of Lesbos, April 5, 2016. REUTERS/Giorgos Moutafis 

Migrants and refugees sit on a railway track at a makeshift camp at the Greek-Macedonian border near the village of Idomeni, Greece, April 3, 2016. REUTERS/Marko Djurica 

A child sleeps as migrants and refugees block the highway during a protest near the Greek-Macedonian border, near the town of Polykastro, Greece, April 2, 2016. REUTERS/Marko Djurica 

A migrant from Pakistan stands on a field after taking a bath before Friday prayer at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, April 1, 2016. REUTERS/Marko Djurica 

A child places his hands on a fence as Greek police officers stand guard after minor clashes occurred at a makeshift camp for migrants and refugees at the Greek-Macedonian border near the village of Idomeni, Greece, March 29, 2016. REUTERS/Marko Djurica 

A man looks at the Greek-Macedonian border fence near a makeshift camp for migrants and refugees near the village of Idomeni, Greece, March 25, 2016. REUTERS/Marko Djurica 

A child is covered with a plastic raincoat for protection from rain in a makeshift camp for refugees and migrants at the Greek-Macedonian border near the village of Idomeni, Greece, March 24, 2016. REUTERS/Alexandros Avramidis 

Bunk beds stand in a sleeping room in a Swiss Federal refugee center, set-up in a tank hall on the army base in Thun, Switzerland March 22, 2016. REUTERS/Ruben Sprich 

The sun rises as a dinghy carrying refugees and migrants approaches the shores of the Greek island of Lesbos, March 20, 2016. REUTERS/Alkis Konstantinidis 

Refugees move among tents set next to railway tracks at a makeshift camp at the Greek-Macedonian border, near the village of Idomeni, Greece March 16, 2016. Picture taken March 16. REUTERS/Alkis Konstantinidis 

A blanket flutters in the air as it hangs on the border fence at the Greek-Macedonian border, at a makeshift camp for refugees and migrants near the village of Idomeni, Greece, March 19, 2016. REUTERS/Alkis Konstantinidis 

A Syrian refugee sits next to her tent at a makeshift camp at the Greek-Macedonian border near the village of Idomeni, Greece, March 18, 2016. REUTERS/Alkis Konstantinidis 

A refugee prepares breakfast at a makeshift camp for refugees and migrants at the Greek-Macedonian border near the village of Idomeni, Greece, March 18, 2016. REUTERS/Alkis Konstantinidis 

Blankets are laid to dry on barbed wire next to the border fence at the Greek-Macedonian border, at a makeshift camp for refugees and migrants , near the village of Idomeni, Greece March 17, 2016. REUTERS/Alkis Konstantinidis 

A thermal blanket is laid on mud at a makeshift camp at the Greek-Macedonian border, near the village of Idomeni, Greece March 15, 2016. REUTERS/Alkis Konstantinidis 

The shackled legs of suspected human traffickers are seen as they arrive for their trial at the criminal court in Bangkok, Thailand, March 15, 2016. REUTERS/Chaiwat Subprasom 

Migrants stand by a fire to keep themselves warm at a makeshift camp on the Greek-Macedonian border, near the village of Idomeni, Greece, March 13, 2016. REUTERS/Stoyan Nenov 

Migrants stand near their tents on a foggy morning at a makeshift camp on the Greek-Macedonian border, near the village of Idomeni, Greece March 11, 2016. REUTERS/Stoyan Nenov 

Migrants stand near their tents on a foggy morning at a makeshift camp on the Greek-Macedonian border, near the village of Idomeni, Greece March 11, 2016. REUTERS/Stoyan Nenov 

A migrant stands near his tent on a foggy morning at a makeshift camp on the Greek-Macedonian border, near the village of Idomeni, Greece March 11, 2016. REUTERS/Stoyan Nenov 

A migrant walks in the filed on a foggy morning near a makeshift camp on the Greek-Macedonian border, near the village of Idomeni, Greece March 11, 2016. REUTERS/Stoyan Nenov 

A Kurdish migrant family from Irak stands at the door of their wood shelter in a refugee camp with humanitarian-standard shelters in Grande-Synthe, near Dunkirk, northern France, March 8, 2016. REUTERS/Pascal Rossignol

Migrants, who are waiting to cross the Greek-Macedonian border, collect firewood at a makeshift camp near the village of Idomeni, Greece March 8, 2016. REUTERS/Marko Djurica 

A migrant is silhouetted as he makes his way through a field towards a makeshift camp at the Greek-Macedonian border, near the Greek village of Idomeni, Greece March 5, 2016. REUTERS/Alexandros Avramidis 

Migrant girls play on a swing outside of a refugee shelter which focuses on women and families, in Berlin, Germany March 3, 2016. Picture taken March 3. REUTERS/Stefanie Loos 

A migrant who is waiting to cross the Greek-Macedonian border, holds on to the border fence near the village of Idomeni, Greece, March 3, 2016. REUTERS/Marko Djurica 

A Cuban migrant raises his hand after travelling en route from Panama to Mexico and the U.S., as part of a pilot programme agreed by Central American countries to allow the migrants to continue towards the US, in El Paso, Texas, March 2, 2016. REUTERS/Jose Luis Gonzalez 

A migrant stands near a burning makeshift shelter set ablaze in protest against the partial dismantlement of the camp for migrants called the "jungle", in Calais, France, March 1, 2016. REUTERS/Pascal Rossignol

A migrant stands near a burning makeshift shelter set ablaze in protest against the partial dismantlement of the camp for migrants called the "jungle", in Calais, France, March 1, 2016. REUTERS/Pascal Rossignol

Macedonian riot policemen patrol at the Macedonian-Greek border in Gevgelija, Macedonia March 1, 2016. REUTERS/Marko Djurica 

A pair of boots and socks belonging to a migrant are put out to dry at a migrant shelter in Ciudad Juarez, Mexico, February 18, 2016. Picture taken February 18, 2016. REUTERS/Jose Luis Gonzalez 

Migrant children stand on a field near a camp set by stranded migrants waiting to cross the Greek-Macedonian border, near the Greek village of Idomenii March 1, 2016. REUTERS/Marko Djurica 

Migrant children stand on a field near a camp set by stranded migrants waiting to cross the Greek-Macedonian border, near the Greek village of Idomenii March 1, 2016. REUTERS/Marko Djurica 

Migrant children stand on a field near a camp set by stranded migrants waiting to cross the Greek-Macedonian border, near the Greek village of Idomenii March 1, 2016. REUTERS/Marko Djurica 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Stranded refugees take part in a protest at the Greek-Macedonian border as they wait for the border crossing to reopen near the Greek village of Idomeni February 27, 2016. REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A stranded refugee lifts his child in front of a fence as he and hundreds of others take part in a protest at the Greek-Macedonian border near the Greek village of Idomeni February 27, 2016. REUTERS/Yannis Behrakis TPX IMAGES OF THE DAY 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A stranded Syrian refugee watches a train speed past from behind a fence at the Greek-Macedonian border February 26, 2016, as he and his family wait for the border crossing to reopen near the Greek village of Idomeni. REUTERS/Yannis Behrakis 

An Eritrean migrant walks in the mud in the southern part of a camp for migrants called the "jungle", in Calais, northern France, February 24, 2016. The administrative tribunal in regional capital Lille was to decide whether closing part of the site would violate human rights after several local charities and migrants requested a temporary injunction to halt the planned evacuation. REUTERS/Pascal Rossignol

A migrant rests inside a tent at the Macedonian-Serbian border near the village of Tabanovce, Macedonia February 24, 2016. REUTERS/Marko Djurica 

Greek policemen line up at the Greek-Macedonian border, after additional passage restrictions imposed by Macedonian authorities left hundreds of them stranded near the village of Idomeni, Greece, February 23, 2016. The picture was taken from the Macedonian side of the border. REUTERS/Marko Djurica 

Migrants walk along Hungary's border fence on the Serbian side of the border near Morahalom, Hungary, February 22, 2016, REUTERS/Laszlo Balogh 

Migrants walk along Hungary's border fence on the Serbian side of the border near Morahalom, Hungary, February 22, 2016. REUTERS/Laszlo Balogh TPX IMAGES OF THE DAY

A Thai migrant catches crabs at an estuary, on Zikim beach in the Mediterranean sea near the southern Israeli city of Ashkelon February 18, 2016. REUTERS/Amir Cohen 

A Thai migrant catches crabs at an estuary, on Zikim beach in the Mediterranean sea near the southern Israeli city of Ashkelon February 18, 2016. REUTERS/Amir Cohen TPX IMAGES OF THE DAY

A girl asks a passerby for help to pay a medical bill as her father sits in his wheelchair in the Douma neighbourhood of Damascus Syria February 3, 2016. Reuters Photographer Bassam Khabieh: "Shahrour, 54, developed diabetes at the beginning of the war in Syria. When the siege of Arbeen, in the Damascus suburbs, began, his medical condition worsened and his right foot was amputated. He can no longer work. He and some of his extended family, a total of 18 people, live in the same house. One son, 24, has chronic asthma and also cannot work. His children include two daughters. 'When my pregnant daughter went to hospital in the city of Douma, she needed a drug which was not available in the hospital. (...) I did not have the money to buy the prescription...' He broke down in tears. Medication for father and son costs about $15 a month. The family cannot always raise that as the income of those in work varies each day. 'We couldn't buy firewood' in winter, he said. 'My children would collect some during the day which would burn in one hour on a long cold winter's night. When the weather got too cold, we burnt the old cotton pillows.' Shahrour thinks he and his family should flee their town, and also leave Syria. He knows the situation is no better outside, he said. Nor can he afford to shoulder the financial burdens he may face outside Syria. He and his family have no option but to stay, hoping for a breakthrough." REUTERS/Bassam Khabieh SEARCH "SHAHROUR" FOR ALL IMAGES TPX IMAGES OF THE DAY

People attend a cooking workshop for Germans and migrants in Berlin, Germany, January 30, 2016. To match EUROPE-MIGRANTS/GERMANY-HELPERS REUTERS/Hannibal Hanschke

A migrant child walks through the first registration camp of Erding near Munich, Germany, January 27, 2016. REUTERS/Michaela Rehle TPX IMAGES OF THE DAY 

People gather on the town hall square in the historical old part of Freiburg, Germany, January 24, 2016. Several night clubs in Freiburg, renowned for its 'welcome culture' towards asylum seekers, are reportedly refusing to admit refugees. The reported development, which would breach rules on non-discrimination, follows reports of sexual harassment, theft and violence. REUTERS/Kai Pfaffenbach

Migrants warm themselves by a fire while waiting for a train to Croatia at a train station in Presevo, Serbia, January 20, 2016. REUTERS/Marko Djurica 

A migrant walks through a frozen field after crossing the border from Macedonia, near the village of Miratovac, Serbia, January 18, 2016. REUTERS/Marko Djurica 

Migrants walk through a field covered in snow after crossing the border from Macedonia, at Miratovac, Serbia, January 17, 2016. REUTERS/Marko Djurica 

Migrants walk through a field covered in snow after crossing the border from Macedonia, at Miratovac, Serbia, January 17, 2016. REUTERS/Marko Djurica 

Migrants walk along a road after crossing the border from Macedonia, at Miratovac, Serbia, January 17, 2016. REUTERS/Marko Djurica TPX IMAGES OF THE DAY

Aerial view of a makeshift camp as containers (rear) are put into place to house several hundred migrants living in what is known as the "Jungle", a squalid sprawling camp in Calais, northern France, January 17, 2016. REUTERS/Pascal Rossignol 

Aerial view of a makeshift camp as containers (rear L) are put into place to house several hundred migrants living in what is known as the "Jungle", a squalid sprawling camp in Calais, northern France, January 17, 2016. REUTERS/Pascal Rossignol 

Aerial view of a makeshift camp where migrants live in what is known as the "Jungle", a squalid sprawling camp in Calais, northern France, January 17, 2016. REUTERS/Pascal Rossignol 

Aerial view of a makeshift camp as containers (L) are put into place to house several hundred migrants living in what is known as the "Jungle", a squalid sprawling camp in Calais, northern France, January 17, 2016. REUTERS/Pascal Rossignol 

Aerial view of a makeshift camp as containers (front) are put into place to house several hundred migrants living in what is known as the "Jungle", a squalid sprawling camp in Calais, northern France, January 17, 2016. REUTERS/Pascal Rossignol