A Syrian boy is hugged by his mother moments after they arrived at a beach on the Greek island of Kos after crossing a part of the Aegean sea from Turkey to Greece, August 15, 2015. The United Nations refugee agency called on Greece to take control of the "total chaos" on Mediterranean islands, where thousands of migrants have landed. About 124,000 have arrived this year by sea, many via Turkey, according to Vincent Cochetel, UNHCR director for Europe.