“Nato is ready and able to defend all allies, including Turkey against any threats,” Stoltenberg said. The move is in response to a claim by Turkey a Russian warplane violated its airspace last week. Ankara scrambled two F-16s to intercept the Russian aircraft and summoned the Russian ambassador in protest. According to McClatchy, however, the Russian jet did not violate Turkish airspace:

A Turkish security official said Turkish radar locked onto the Russian aircraft as it was bombing early Friday in al Yamdiyyah, a Syrian village directly on the Turkish border. He said Turkish fighter jets would have attacked had it crossed into Turkish airspace. But a U.S. military official suggested the incident had come close to sparking an armed confrontation. Reading from a report, he said the Russian aircraft had violated Turkish air space by five miles and that Turkish jets had scrambled, but that the Russian aircraft had returned to Syrian airspace before they could respond.

McClatchy also notes Turkey has moved its border: Turkey has maintained a buffer zone five miles inside Syria since June 2012, when a Syrian air defense missile shot down a Turkish fighter plane that had strayed into Syrian airspace. Under revised rules of engagement put in effect then, the Turkish air force would evaluate any target coming within five miles of the Turkish border as an enemy and act accordingly. CONTINUE