AFP, BEIRUT: Militants led by Al-Qaeda in Syria killed at least 56 soldiers, some execution-style, when they overran the regime’s last base in Idlib province under the cover of a sandstorm, a monitor said Thursday. Dozens of others were either taken prisoner or went missing when the Al-Nusra Front and a coalition of mostly Islamist groups captured the Abu Duhur military airport on Wednesday, the Syrian Observatory for Human Rights said. “There were at least 56 (soldiers) killed yesterday and at least 40 taken prisoner, and dozens more are missing,” the Observatory’s Rami Abdel Rahman told AFP.