The deal allowing U.S. planes to use Turkish bases to strike Islamic State militants is paving the way for establishment of a de facto no-fly zone in northern Syria, Turkish and American officials said. The broad sketches of the understanding include eventually relying on moderate Syrian rebels to help take control of a buffer zone along the Turkish border, according to a Turkish official who spoke on Sunday. Turkey has pledged to use its F-16 fighter jets to help clear the extremist group’s forces from a safe zone about 55 miles wide and 25 miles deep, the Turkish official added. If rebels can take control, the area would be protected by coalition airstrikes so Syrian refugees, including some of the nearly two million living in Turkey, can return to their country, the Turkish official said. The evolving plans open a risky new front for the U.S. in its fight […]