In this photo taken from the Turkish side of the border between Turkey and Syria, in Akcakale, Sanliurfa province, southeastern Turkey, a flag of Kurdish People's Protection Units, or YPG, flies on a building in the Syrian town of Tel Abyad, Tuesday, Oct. 8, 2019. Turkey's vice president says his country won't bow to threats in an apparent response to U.S. President Donald Trump's warning to Ankara about the scope of its planned military incursion into Syria aiming to create a zone that would allow Turkey to resettle Syrian refugees there. (AP Photo/Lefteris Pitarakis), APTOPIX