KOS, GREECE - AUGUST 28:  Two migrants from Syria are assisted by their friends as they swim the final 50 yards of their journey before arriving on the beach on the island of Kos after crossing a three mile stretch of the Aegean Sea in a small boat from Turkey August 28, 2015 in Kos, Greece. Migrants from the Middle East and North Africa continue to flood into Europe at a rate that marks the largest migration since World War II.  (Photo by Win McNamee/Getty Images)