Russian daily newspaper Nezavisimaya Gazeta reported that Turkey has prevented four Russian military aircraft, including two bombers, from crossing its airspace to Syria.

As a humanitarian disaster unfolds in Idlib, the last bastion of Syria’s Islamist rebels, the question is whether accommodation is possible between the militants and their foes. External actors should answer by gauging the insurgents’ ability to maintain calm and their sincerity about aiding civilians.

What happened? An airstrike killed at least 33 Turkish soldiers in Idlib, in the north west of Syria, on 27 February, according to Turkish state media. The strike exacted the highest death toll upon the Turkish military in any single day’s action for more than two decades. Ankara mainly blamed …