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A young boy cries as police block a group of migrants trying to cross the Macedonian-Greek border near the town of Gevgelija on August 21, 2015. Macedonia said on August 20 that it had declared a "state of emergency" on its southern border with Greece and would draft in the army to help control the influx of migrants crossing the frontier. AFP PHOTO / ROBERT ATANASOVSKIROBERT ATANASOVSKI/AFP/Getty Images
A young boy cries as police block a group of migrants trying to cross the Macedonian-Greek border near the town of Gevgelija on August 21, 2015. Macedonia said on August 20 that it had declared a "state of emergency" on its southern border with Greece and would draft in the army to help control the influx of migrants crossing the frontier. AFP PHOTO / ROBERT ATANASOVSKIROBERT ATANASOVSKI/AFP/Getty Images

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EU refugee crisis: 'What we need is collective action'

Christiane Amanpour talks to Alexander Betts from the Refugee Studies Centre at Oxford University about the potential solutions to Europe's refugee crisis.

EU refugee crisis: 'What we need is collective action'

Christiane Amanpour talks to Alexander Betts from the Refugee Studies Centre at Oxford University about the potential solutions to Europe's refugee crisis.