The New York Times: Reports " ....Islamic State fighters in Iraq are using advanced surface-to-air missile systems that pose a serious threat to aircraft flown by Iraq and the American-led coalition. "
Lets Get Real:
The above is WHY that US and its allies need ground forces to take down IS who might have the above missile systems, a air strategy alone is doomed to failure, even if you take out IS in Syria and Iraq you need ground forces to take and hold the land, otherwise you take out one group of IS terrorists to see them replaced by other IS terrorists. The Kobane siege and it is a siege is a classic example that you need trained forces on the ground to match the air war. IF IS can start to take out Western planes the alliance will get smaller with every successful attack on a Western plane. Thus to prevent losing the ground war the US and its allies should send in special forces, this is the only way that the West can win, and its about winning at the end of the day.