In this Wednesday, Sept. 9, 2015 photo refugees and migrants aboard an overcrowded dinghy as they cross the Aegean Sea, from Turkey, that is seen in the background, to the coast of Lesbos island, Greece. Greek authorities have invited private contractors to bid on supplying a 2.7-kilometer-long (1.7 miles) floating barrier system aimed at stopping migrants from reaching the country's islands from the nearby coast of Turkey. (AP Photo/Petros Giannakouris)
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