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Turkey has sent tanks and warplanes into northern Syria. Their stated target is a Kurdish militia group, the YPG, regarded by Ankara as a terrorist organisation allied to the Kurdistan Workers' Party, the PKK, which has been fighting for autonomy in Turkey for decades. It's an indication of the complexity of this conflict is that while Turkey regards the YPG as a serious threat, the same group has been a key ally of the United States in the battle against the so-called Islamic State in Syria. If Turkey were to achieve its stated aim of destroying the YPG - or even just loosen its hold in the border region - who would fill the vacuum? On Newshour Extra this week Ritula Shah and her guests discuss Turkey's war aims in Syria and ask whether Ankara can persuade Washington to abandon the Kurds.

Photo: a Syrian woman and child who fled from the Turkish offensive on the Afrin enclave. Credit: Getty Images