Refugees and migrants disembark from the passenger ship “Tera Jet”, following their trip from the island of Lesbos to the port of Piraeus, near Athens, Greece September 1, 2015. The International Organization for Migration (IOM) says 1,500-2,000 are taking the route through Greece, Macedonia and Serbia to Hungary every day and that there is “a real possibility” the flow could rise to 3,000 daily. (Photo by Alkis Konstantinidis/Reuters)

Migrants crowd the bridge of the Norwegian Siem Pilot ship sailing along the Mediterranean sea, Wednesday, September 2, 2015. The Siem Pilot is carrying to the Italian Port of Cagliari hundreds of migrants rescued in several operations in the Mediterranean sea. (Photo by Gregorio Borgia/AP Photo)

A Syrian refugee family takes a picture in front of the passenger ship “Tera Jet”, following their trip from the island of Lesbos to the port of Piraeus, near Athens, Greece September 1, 2015. (Photo by Alkis Konstantinidis/Reuters)

Migrants look at the sea as they crowd the bridge of the Norwegian Siem Pilot ship, Wednesday, September 2, 2015. The Siem Pilot is carrying to the Italian Port of Cagliari hundreds of migrants rescued in several operations in the Mediterranean sea. (Photo by Gregorio Borgia/AP Photo)

A Swiss police officer accompanies a migrant from Syria carrying her baby, upon her arrival at the railway station in the north-eastern Swiss town of Buchs September 1, 2015. (Photo by Arnd Wiegmann/Reuters)

A Swiss police officer accompanies a migrant from Syria carrying her baby, as media takes pictures upon her arrival at the railway station in the north-eastern Swiss town of Buchs September 1, 2015. (Photo by Arnd Wiegmann/Reuters)

Migrants gesture as they stand in the main Eastern Railway station in Budapest, Hungary, September 1, 2015. Hungary closed Budapest's main Eastern Railway station on Tuesday morning with no trains departing or arriving until further notice, a spokesman for state railway company MAV said. There are hundreds of migrants waiting at the station. People have been told to leave the station and police have lined up at the main entrance, national news agency MTI reported. (Photo by Laszlo Balogh/Reuters)

Migrants waiting for their trains fight in a massive crowd at the Eastern (Keleti) railway station of Budapest on September 1, 2015, during the evacuation of the railway station by local police. Budapest's main international railway station ordered an evacuation as hundreds of migrants tried to board trains to Austria and Germany, an AFP reporter at the scene said. (Photo by Attila Kisbenedek/AFP Photo)

Riot police stand on the train track as they monitor migrants and refugees at the Keleti (eastern) railway station in Budapest on September 1, 2015. Keleti, the biggest Hungarian railway station was closed today as police evacuated people trying to get on trains bound for Germany. (Photo by Attila Kisbenedek/AFP Photo)

Migrants face Hungarian police in the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

A girl walks past a line of Hungarian police at the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

A migrant carries his child in front of a line of hungarian policemen at the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants face Hungarian police in the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants face Hungarian police in the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Hungarian police officers watch migrants outside the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants wave their train tickets and lift up children outside the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants wave their train tickets outside the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants demonstrate outside the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants rest in an underground station near the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants rest in an underground station near the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants demonstrate outside the main Eastern Railway station in Budapest, Hungary, September 1, 2015. Hundreds of angry migrants demonstrated on Tuesday demanding they be allowed to travel on to Germany, as the biggest ever influx of migrants into the European Union left its asylum policies in tatters. Around 1,000 people waved tickets, clapping, booing and hissing, and shouting "Germany! Germany!" outside the station. A refugee crisis rivalling the Balkan wars of the 1990s as Europe's worst since World War Two has polarised and confounded the European Union, which has no mechanism to cope with the arrival of hundreds of thousands of poor and desperate people. (Photo by Laszlo Balogh/Reuters)

Migrants rest on the steps to an underground station near the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants demonstrate outside the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants form a sit-down demonstration as police block the entrance to the main Eastern Railway station in Budapest, Hungary, September 1, 2015. (Photo by Laszlo Balogh/Reuters)

A child of a migrant sleeps on the ground outside the main railway station in Munich, Germany, September 1, 2015. (Photo by Lukas Barth/Reuters)

A German policeman watches migrants outside the main railway station in Munich, Germany, September 1, 2015. (Photo by Lukas Barth/Reuters)

Migrants arrive to the main railway station in Munich, Germany, September 1, 2015. The German government expects that between 240,000 and 460,000 extra people will be entitled to social benefits next year due to the influx of refugees and migrants, Labour Minister Andrea Nahles said on Tuesday. (Photo by Lukas Barth/Reuters)

A girl holds a teddy bear as she stands among migrants outside the main railway station in Munich, Germany, September 1, 2015. (Photo by Lukas Barth/Reuters)

Migrants arrive to the main railway station in Munich, Germany, September 1, 2015. (Photo by Lukas Barth/Reuters)

A migrant sits with her children outside the main railway station in Munich, Germany, September 1, 2015. (Photo by Lukas Barth/Reuters)

A migrant waits to enter Macedonia near Gevgelija at the border with Greece September 1, 2015. The International Organization for Migration (IOM) says 1,500-2,000 are taking the route through Greece, Macedonia and Serbia to Hungary every day and that there is “a real possibility” the flow could rise to 3,000 daily. (Photo by Ognen Teofilovski/Reuters)

Migrants enter Macedonia near Gevgelija after crossing the border with Greece, September 1, 2015. Migrants are trekking from the southern Macedonian border near Gevgelija to the northern border with Serbia on their way to Western Europe. Trains carrying hundreds of migrants started arriving in Vienna on Monday after Austrian authorities appeared to give up trying to apply European Union rules by filtering out refugees who had already claimed asylum in Hungary. In the latest twist in a humanitarian and political crisis that is now testing the survival of both Europe's open-border regime and its asylum rules, Hungary allowed the migrants, many of them fleeing Syria's civil war, to cram into at least four trains leaving Budapest for Austria or Germany. (Photo by Ognen Teofilovski/Reuters)

Migrants enter Macedonia near Gevgelija after crossing the border with Greece, September 1, 2015. (Photo by Ognen Teofilovski/Reuters)

A Greek policeman gestures as migrants wait to enter Macedonia near Gevgelija, at the border with Greece September 1, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants enter Macedonia near Gevgelija after crossing the border with Greece, September 1, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants enter Macedonia near Gevgelija after crossing the border with Greece, September 1, 2015. (Photo by Ognen Teofilovski/Reuters)

Macedonian soldiers distribute food to migrants in Macedonia near Gevgelija at the border with Greece September 1, 2015. (Photo by Ognen Teofilovski/Reuters)

A Greek police officer (R) tries to line up migrants who wait to cross Greece's border with Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

A migrant stands in front of Macedonian special police forces as she waits to cross Greece's border with Macedonia, near the village of Idomeni, September 2, 2015. Migrants are trekking from the southern Macedonian border with Greece, near Gevgelija, to the northern border with Serbia on their way to Western Europe. (Photo by Alexandros Avramidis/Reuters)

Migrants wait to cross Greece's border with Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

A migrant collapses from heat while waiting to cross Greece's border with Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

Migrants wait to cross Greece's border with Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

A Macedonian police officer (C) raises his baton towards migrants waiting to cross Greece's border with Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

Macedonian special police forces try to bring order as they regulate the flow of migrants crossing the Greek border into Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

Macedonian special police forces try to bring order as they regulate the flow of migrants crossing the Greek border into Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

Macedonian special police forces try to bring order as they regulate the flow of migrants crossing the Greek border into Macedonia, near the village of Idomeni, September 2, 2015. (Photo by Alexandros Avramidis/Reuters)

Migrants rest outside the main Eastern Railway station in Budapest, Hungary, September 2, 2015. Hungary closed Budapest's main Eastern Railway station on Tuesday morning with no trains departing or arriving until further notice, a spokesman for state railway company MAV said. Hundreds of angry migrants demonstrated outside the station on Tuesday demanding they be allowed to travel on to Germany, as the biggest ever influx of migrants into the European Union left its asylum policies in tatters. (Photo by Bernadett Szabo/Reuters)

Migrants rest at an underground station near the main Eastern Railway station in Budapest, Hungary, September 2, 2015. (Photo by Bernadett Szabo/Reuters)

Migrants rest outside the main Eastern Railway station in Budapest, Hungary, September 2, 2015. (Photo by Bernadett Szabo/Reuters)

Migrants rest outside the main Eastern Railway station in Budapest, Hungary, September 2, 2015. (Photo by Bernadett Szabo/Reuters)

Migrants rest at an underground station near the main Eastern Railway station in Budapest, Hungary, September 2, 2015. (Photo by Bernadett Szabo/Reuters)

Protesting migrants from Afghanistan and Syria hold up a child wrapped in blankets, as a reminder of the horrors they have fled, while demonstrating outside the shuttered Keleti Railway Station in Budapest, Hungary, September 2, 2015. (Photo by Bernadett Szabo/Reuters)

A group of migrants try to make their way through the crowd to the Keleti (Eastern) Railway Terminus in Budapest, Hungary, September 2, 2015. Hundreds of migrants protested in front of the terminus for a second straight day on Wednesday, shouting “Freedom, freedom!” and demanding to be let onto trains bound for Germany from a station that has been closed to them. (Photo by Bernadett Szabo/Reuters)

A group of migrants try to make their way through the crowd to the Keleti (Eastern) Railway Terminus in Budapest, Hungary, September 2, 2015. (Photo by Bernadett Szabo/Reuters)

African migrants rest after arriving on a fishing boat at Las Carpinteras beach in the Canary Island of Gran Canaria, Spain, September 1, 2015. Around 60 people, including six women and a two-year-old child, were aboard the fishing boat, according to local authorities. Picture taken September 1, 2015. (Photo by Borja Suarez/Reuters)

An African migrant looks at a local policeman after arriving on a fishing boat at Las Carpinteras beach in the Canary Island of Gran Canaria, Spain, September 1, 2015. (Photo by Borja Suarez/Reuters)

African migrants rest after arriving on a fishing boat at Las Carpinteras beach in the Canary Island of Gran Canaria, Spain, September 1, 2015. (Photo by Borja Suarez/Reuters)

A group of migrants fights with others trying to make their way through the crowd to the Eastern railway station in Budapest, Hungary, September 2, 2015. Hundreds of migrants protested in front of Budapest's Eastern railway station on Wednesday, shouting “Freedom, freedom!” and demanding to be let onto trains bound for Germany but the station remained closed to them. More than 2,000 migrants, including families with children, were waiting in the square at the station in sweltering heat. (Photo by Laszlo Balogh/Reuters)

A crowd of migrants stands outside the Eastern railway station in Budapest, Hungary, September 2, 2015. (Photo by Laszlo Balogh/Reuters)

A group of migrants tries to make their way through the crowd to the Eastern railway station in Budapest, Hungary, September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants protest outside the Eastern railway station in Budapest, Hungary, September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Hungarian police officers face migrants outside the Eastern railway station in Budapest, Hungary, September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants rest in an underground passage near to Keleti train starion in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Hungarian police officers detain a migrant in the middle of a street in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

A Hungarian police officer detains a migrant in the middle of a street in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Amam, a17-year-old refugee from the Syrian town of Latakia shouts after his sister and mother were detained by Hungarian police outside the railways station in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

A child holds a self-made placard reading “SOS help me” outside the railways station in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Refugees raise their documents and railways tickets outside the Keleti station in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Hungarian police officers block the entrance of the Keleti train station for refugees in Budapest, Hungary September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Hungarian police guard refugees at a makeshift camp in an underground station near the Keleti train station in Budapest, Hungary September 2, 2015. (Photo by Leonhard Foeger/Reuters)

Children of Syrian refugees play at a makeshift camp in an underground station near the Keleti train station in Budapest, Hungary September 2, 2015. (Photo by Leonhard Foeger/Reuters)

Hungarians walk by as refugees rest at a makeshift camp in an underground station near the Keleti train station in Budapest, Hungary September 2, 2015. (Photo by Leonhard Foeger/Reuters)

A group of migrants tries to make their way through the crowd to the Eastern railway station in Budapest, Hungary, September 2, 2015. (Photo by Laszlo Balogh/Reuters)

Migrants enter Macedonia near Gevgelija after crossing the border with Greece September 2, 2015. Migrants are trekking from the southern Macedonian border near Gevgelija to the northern border with Serbia on their way to Western Europe. (Photo by Ognen Teofilovski/Reuters)

A policeman carries a baby to safety as migrants try to enter Macedonia near Gevgelija after crossing the border with Greece September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

A policeman assists a family as migrants try to enter Macedonia near Gevgelija near the border with Greece September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

A migrant nurses her child as they enter Macedonia near Gevgelija after crossing the border with Greece September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants enter Macedonia near Gevgelija after crossing the border with Greece September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants fall as they rush to cross into Macedonia after Macedonian police allowed a small group of people to pass through a passageway, as they try to regulate the flow of migrants at the Macedonian-Greek border September 2, 2015. Up to 3,000 migrants are expected to cross into Macedonia every day in the coming months, most of them refugees fleeing war, particularly from Syria, the United Nations said last week. (Photo by Ognen Teofilovski/Reuters)

Migrants rush to cross into Macedonia after Macedonian police allowed a small group of people to pass through a passageway, as they try to regulate the flow of migrants at the Macedonian-Greek border September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants fall as they rush to cross into Macedonia after Macedonian police allowed a small group of people to pass through a passageway, as they try to regulate the flow of migrants at the Macedonian-Greek border September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants fall as they rush to cross into Macedonia after Macedonian police allowed a small group of people to pass through a passageway, as they try to regulate the flow of migrants at the Macedonian-Greek border September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

Migrants rush to cross into Macedonia after Macedonian police allowed a small group of people to pass through a passageway, as they try to regulate the flow of migrants at the Macedonian-Greek border September 2, 2015. (Photo by Ognen Teofilovski/Reuters)

A Czech police officer writes a number on the skin of a refugee in Breclav, Czech Republic September 1, 2015. (Photo by Igor Zehl/Reuters)

Seventy-one people stand in front of a truck during a public re-enactment referring to the 71 dead refugees found in the back of an abandoned truck, in Bochum, Germany September 2, 2015. The Bochum Theater and carrier Gerard Graf organized the event after 71 dead refugees were found in an abandoned refrigeration truck on an Austria highway last Thursday. (Photo by Ina Fassbender/Reuters)

Roses and a sign that reads “never again murder for 71 people” are pictured during a public re-enactment referring to the 71 dead refugees found in the back of an abandoned truck, in Bochum, Germany September 2, 2015. (Photo by Ina Fassbender/Reuters)

Seventy-one people stand in a truck during a public re-enactment referring to the 71 dead refugees found in the back of an abandoned truck, in Bochum, Germany September 2, 2015. (Photo by Ina Fassbender/Reuters)

In this Tuesday, September 1, 2015, photo, a Hungarian police officer looks from his binoculars as he checks the border searching for refugees entering the country illegally next to the town of Röszke, Hungary. Over 150,000 migrants have reached Hungary this year, most coming through the southern border with Serbia. Many apply for asylum but quickly try to leave for richer EU countries. (Photo by Santi Palacios/AP Photo)

A local resident offers grapes to an Afghan migrant as they sit at Victoria square, Athens, Wednesday, September 2, 2015, where many migrants stay temporarily before continuing their trip to more prosperous European countries. The country has borne the brunt of a massive refugee and migration flow of people heading into the European Union, with more than 200,000 people arriving so far this year. (Photo by Thanassis Stavrakis/AP Photo)