>> A giant concrete barrier to seal off Turkey from Syria, that's the hope from Ankara as it rushes to complete a wall along its entire 900 kilometer southern border by February, combating smuggling and illegal migration the aim. Last month, Turkey launched its first major operation into Syria, successfully driving Islamic State militants from an enclave they controlled just across the border.
That followed several Islamist militant attacks on Turkish soil. Reuters Nick Tattersall reports from Istanbul.>> Thousands of foreign fighters have crossed through Turkey, have crossed the Turkish border with Syria to reach Islamic State controlled territory in Syria around Raqqa, the de facto capital for Islamic State. That's something that has led to criticism from Turkey's western allies who have said it needed to get that border under tighter control.
>> Turkey's keep out message, also aimed at Syrian Kurdish militants who it fears could link up to Kurdish insurgents within Turkey. On top of that, It wants to control the flow of Syrian refugees.>> Turkey was proud, in the early years of the Syrian conflict, of its open border policy.
It's now taken in more than 3 million Syrian refugees. The question though, now, is whether this war will mean that that open door policy is completely finished. Certainly, there's concern in Turkey that the intensification of fighting around Aleppo could lead to new refugee flows.>> Construction on the wall started back in 2014, a 200 kilometer stretch already completed.
Local media have reported that in total, it will cost nearly $700 million, including a military patrol road that will run its length. Turkey has set itself a feat of engineering to complete the remaining 700 kilometers in just five months.