A Turkish flag flies over the Karkamis border crossing as an Islamic State flag is seen at the customs...
A Turkish flag flies over the Karkamis border crossing, as an Islamic State flag is seen at the customs office of Syria's Jarablus border gate in the background, in Karkamis, in Gaziantep province, Turkey August 1, 2015. Karkamis is a Turkish town of 10,500 people, sits directly opposite the border post. Shut for more than a year, the military sealed the crossing with a breeze block wall a few months ago. Behind it, just inside Syria, the black flag of Islamic State flaps in the breeze. Karkamis lies on the northeastern edge of a rectangle of Syrian territory some 80 km (50 miles) long, controlled by the radical Islamists. The United States and Turkey hope that by sweeping Islamic State from this border zone, they can deprive it of a smuggling route which has seen its ranks swollen with foreign fighters and its coffers boosted by illicit trade. Picture taken August 1, 2015. REUTERS/Murad Sezer