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GEVGELIJA, MACEDONIA - JULY 22: People, including illegal and non-illegal immigrants get on the train which is going to proceed Tabanovce of Macedonia and as next stop Serbia, in Gevgelija, Macedonia on July 22, 2015. People are trying to cross Macedonia and Serbia and enter the European Union countries via Hungary. (Photo by Ilin Nikolovski/Anadolu Agency/Getty Images)

GEVGELIJA, MACEDONIA - JULY 22: People, including illegal and non-illegal immigrants get on the train which is going to proceed Tabanovce of Macedonia and as next stop Serbia, in Gevgelija, Macedonia on July 22, 2015. People are trying to cross Macedonia and Serbia and enter the European Union countries via Hungary. (Photo by Ilin Nikolovski/Anadolu Agency/Getty Images)