• Turkish President Recep Tayyip Erdogan waits for the arrival of European Council President Donald Tusk prior to a meeting at the EU Council building in Brussels on Monday, Oct. 5, 2015. Erdogan is on a two-day visit to meet Belgian and EU officials. (Francois Lenoir, Pool photo via AP)

    Turkey vows to protect borders after Russian jet incursion

    ANKARA, Turkey (AP) — In a signal of new tensions raised by Moscow’s airstrikes in Syria, NATO denounced Russia on Monday for “irresponsible behavior” after its warplanes violated Turkish airspace, and Turkey warned that any future aerial intruder would be treated like an enemy.