The Islamic State Tuesday seized from rebel forces the important northern Syrian town of Khanaser southeast of Aleppo and its surrounding hills. DEBKAfile: ISIS, which now controls a 20-km section of the Aleppo highway to Hama, cuts off the government supply line between Aleppo and central and western Syria. In the last few days, US and Russian forces had discontinued their air strikes against the Islamic State forces advancing on targets in western and central Syria – the Americans, who left the task to the Russians, and the Russians, on the assumption that ISIS was weakening rebel resistance in Aleppo so saving them the task.The Islamic State’s capture of Khanaser proved that the Russian strategists miscalculated badly.