Turkish foreign minister: The Person Arrested for Helping 3 British Girls Join ISIS is a Spy

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As the conflict progressed, the fighters taking advantage of this loose border enforcement were more and more radical. ISIS currently controls about 40% of the 565-mile border with Syria, and doesn't want to give it back.

“They've inadvertently created a mechanism that can yield blowback for them that could be extremely painful,” Jonathan Schanzer, a former counterterrorism analyst for the US Treasury Department and a co-author of a report on Turkey's border practices, told Business Insider in November.

“You have a lot of people now that are invested in the business of extremism in Turkey. If you start to challenge that, it raises significant questions of whether” the militants, their benefactors, and other war profiteers would tolerate the crackdown, according to Schanzer.
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