Migrant boy reacts while waiting with other migrants for the bus which takes them further into Austria at the Hungarian-Austrian border in Nickelsdorf, eastern Austria, on September 5, 2015. Thousands of migrants streamed into Austria from Hungary, in what Vienna called a "wake up call" for Europe to get to grips with its biggest refugee influx since World War II. AFP PHOTO / VLADIMIR SIMICEK (Photo credit should read Vladimir Simicek/AFP/Getty Images)
