Syrian opposition fighters walk through Syria in front of Turkish troops near the Syrian border at Hassa, Hatay province, on January 22, 2018. Turkey on January 22, 2018 shelled Kurdish militia targets in Syria and claimed progress in a cross-border offensive that has stoked concern among its allies and neighbours. The Turkish military on January 20 launched operation "Olive Branch", its second major incursion into Syrian territory during the seven-year civil war. / AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)
