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SENTILJ, SLOVENIA - OCTOBER 17: Refugees wait in line to get a bus to go to Austria in Sentilj, Slovenia after they crossed Slovenia - Croatia border on October 17, 2015. Refugees headed to Austria after Hungary closed its borders with Croatia. (Photo by Ales Beno/Anadolu Agency/Getty Images)

SENTILJ, SLOVENIA - OCTOBER 17: Refugees wait in line to get a bus to go to Austria in Sentilj, Slovenia after they crossed Slovenia - Croatia border on October 17, 2015. Refugees headed to Austria after Hungary closed its borders with Croatia. (Photo by Ales Beno/Anadolu Agency/Getty Images)