FILE - A fighter from the U.S-backed Syrian Manbij Military Council looks through binoculars towards Turkish-backed fighters' positions, at the front line at the village of Halawanji, north of Manbij town, Syria, March 29, 2018. Hardly a day passes in northern Syria without Kurdish fighters and opposition gunmen backed by Turkey exchanging gunfire and shelling and concerns are rising that the situation will only get worse in the coming weeks with Ankara threatening to launch a new major operation along its southern border. (AP Photo/Hussein Malla, File)