Migrants board a boat to the Greek island of Kos on early August 16, 2015 off the shore of Bodrum, southwest Turkey. Photo: AFPA Syrian refugee swims towards a beach as others are seen on a dinghy whose engine broke down a few hundred metres from the shore of the Greek island of Kos after crossing over from Turkey, August 17, 2015. Photo: ReutersAn African migrant tries to come back the shore after failing to board a boat to the Greek island of Kos on early August 16, 2015 off the shore of Bodrum, southwest Turkey. Photo: AFPA Syrian migrant flashes the V-sign for victory after swimming to the shores of the Greek island of Kos from a half-sunk small dinghy on August 17, 2015. Photo: AFPSyrian migrants try to make it to shore in their half-sunk dinghy as they arrive on the Greek island of Kos, on August 17, 2015. Photo: AFPSyrian migrants paddle their dinghy to the shores of the Greek island of Kos on August 17, 2015 after their small engine broke down as they motored across the sea from Turkey. Photo: AFPSyrian migrants swim towards the beach after arriving on an overcrowded dinghy to the Greek island of Kos, on August 15, 2015. Photo: AFPExhausted Iranian migrants paddle an engineless dinghy as they approach the Greek island of Kos August 15, 2015. Photo: ReutersA dinghy with Syrian refugees approaches a beach of the Greek island of Kos, August 14, 2015. Photo: Reuters