Migrants swim towards the shore after their dinghy deflated some 100m away before reaching the Greek island of Lesbos, Greece, September 13, 2015. Of the record total of 432,761 refugees and migrants making the perilous journey across the Mediterranean to Europe so far this year, an estimated 309,000 people had arrived by sea in Greece, the International Organization for Migration (IMO) said on Friday. About half of those crossing the Mediterranean are Syrians fleeing civil war, according to the United Nations refugee agency. [Photo/Agencies]