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Militants of Islamic State (IS) are seen just before explosion of air strike  on Tilsehir hill near Turkish border on October 23, 2014, at Yumurtalik village, in Sanliurfa province. Turkey said on October 21 that Kurdish peshmerga fighters based in Iraq have yet to cross into Syria from Turkish territory, a day after announcing it was assisting their transit to join the battle for the Syrian town of Kobane, also known as Ain al-Arab. It was seen as a major switch in policy by Turkey, which until now has refused to interfere in the over month-long battle for Kobane between Syrian Kurdish fighters and Islamic State (IS) jihadists. AFP PHOTO / BULENT KILIC        (Photo credit should read BULENT KILIC/AFP/Getty Images)
Militants of Islamic State (IS) are seen just before explosion of air strike  on Tilsehir hill near Turkish border on October 23, 2014, at Yumurtalik village, in Sanliurfa province. Turkey said on October 21 that Kurdish peshmerga fighters based in Iraq have yet to cross into Syria from Turkish territory, a day after announcing it was assisting their transit to join the battle for the Syrian town of Kobane, also known as Ain al-Arab. It was seen as a major switch in policy by Turkey, which until now has refused to interfere in the over month-long battle for Kobane between Syrian Kurdish fighters and Islamic State (IS) jihadists. AFP PHOTO / BULENT KILIC        (Photo credit should read BULENT KILIC/AFP/Getty Images)

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CNN's Hala Gorani speaks to former NATO Secretary General Anders Fogh Rasmussen about why he thinks the west needs a new strategy to defeat ISIS.

Rasmussen: Air campaign not enough to defeat ISIS

CNN's Hala Gorani speaks to former NATO Secretary General Anders Fogh Rasmussen about why he thinks the west needs a new strategy to defeat ISIS.