MITILINI, GREECE - OCTOBER 13:  A man hugs his son moments after arriving on the island of Lesbos in a raft from Turkey with other Iraqi and Syrian refugees October 13, 2015 in Mitilini, Greece. Dozens of rafts are still making the journey daily as thousands flee conflict in Iraq, Syria and Afghanistan. More than 500,000 migrants have entered Europe so far this year. Of that number four-fifths of have paid to be smuggled by sea to Greece from Turkey, the main transit route into the EU. Nearly all of those entering Greece on a boat from Turkey are from the war zones of Syria, Iraq and Afghanistan.  (Photo by Spencer Platt/Getty Images)