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Open Image ModalMigrants walk along the Hegyalja Street in Budapest, Hungary, Friday, Sept. 4, 2015. Several thousand migrants left the Keleti railway station in Budapest this afternoon heading for Germany on foot. (Zsolt Szigetvary/MTI via AP) ) (credit:ASSOCIATED PRESS)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalHundreds of migrants cross the river Danube in Budapest, Friday Sept, 4, 2015, after they decided to walk toward Austria. Thousands have been camped out at Budapest's Keleti train station for days, before they decided to try and reach their destination on foot. (Zsolt Szigetvary/MTI via AP) (credit:ASSOCIATED PRESS)
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Open Image ModalHundreds of migrants cross the river Danube in Budapest, Friday Sept, 4, 2015, after they decided to walk toward Austria. Thousands have been camped out at Budapest's Keleti train station for days, before they decided to try and reach their destination on foot. (Zsolt Szigetvary/MTI via AP) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants thread their way through a police blockade as they walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalAsylum-seekers cross the Danube as they start to walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalA migrant holds an EU flag as hundreds of migrants walk on a road after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / FERENC ISZA (Photo credit should read FERENC ISZA/AFP/Getty Images) (credit:FERENC ISZA via Getty Images)
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Open Image ModalMigrants thread their way through a police blockade as they walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants cross the Danube as they out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants thread their way through a police blockade as they walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalMigrants hold hands as they walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:ASSOCIATED PRESS)
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Open Image ModalA disabled migrant wearing a poster of German Chancellor Angela Merkel on his neck as hundreds of migrants walk on a highway after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / FERENC ISZA (Photo credit should read FERENC ISZA/AFP/Getty Images) (credit:FERENC ISZA via Getty Images)
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Open Image ModalA migrant holds an EU flag as police cordons hundreds of migrants walking after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / FERENC ISZA (Photo credit should read FERENC ISZA/AFP/Getty Images) (credit:FERENC ISZA via Getty Images)
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Open Image ModalA migrant holds an EU flag as hundreds of migrants walk on a road after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / FERENC ISZA (Photo credit should read FERENC ISZA/AFP/Getty Images) (credit:FERENC ISZA via Getty Images)
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Open Image ModalHundreds of migrants walk across Budapest after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / PETER KOHALMI (Photo credit should read PETER KOHALMI/AFP/Getty Images) (credit:PETER KOHALMI via Getty Images)
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Open Image ModalHundreds of migrants walk on a highway after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany.AFP PHOTO / FERENC ISZA (Photo credit should read FERENC ISZA/AFP/Getty Images) (credit:FERENC ISZA via Getty Images)
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Open Image ModalA migrant girl lifts a poster with a picture of German Chancellor Angela Merkel as hundreds of migrants walk across Budapest after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / PETER KOHALMI (Photo credit should read PETER KOHALMI/AFP/Getty Images) (credit:PETER KOHALMI via Getty Images)
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Open Image ModalHundreds of migrants walking across Budapest after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany. AFP PHOTO / PETER KOHALMI (Photo credit should read PETER KOHALMI/AFP/Getty Images) (credit:PETER KOHALMI via Getty Images)
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Open Image ModalHundreds of migrants walk after leaving the transit zone of the Budapest main train station, on September 4, 2015 intenting on walking to the Austrian border. They were part of an estimated 2,000 migrants stuck in makeshift refugee camps at Keleti station, after railway authorities had blocked them from boarding trains to Austria and Germany.AFP PHOTO / FERENC ISZA (Photo credit should read FERENC ISZA/AFP/Getty Images) (credit:FERENC ISZA via Getty Images)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants start to walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants hold hands as they walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalMigrants walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)
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Open Image ModalA large group of asylum-seekers walk out of Budapest, Hungary, Friday, Sept. 4, 2015. Over 150,000 people seeking to enter Europe have reached Hungary this year, most coming through the southern border with Serbia, and many apply for asylum but quickly try to leave for richer EU countries. (AP Photo/Frank Augstein) (credit:Frank Augstein/AP)