but turkey's view of the islamic state is ampositive lents. they are determined to see the end of bashar al-assad, and don't see, in looking at syria, see many players likely to achieve that goal. >> one of turkey's complicated relationships is with iraq's kurds, who have autonomy in northern iraq. turkey fought an insurgency on its own territory, taking the lives of 30,000 people. over the past few years turkey forged a relationship with iraq's kurds, yielding 6.2 million barrels of oil, worth $600 million through a pipeline. the iraqi kurds in turn use that money to finance kurdish peshmerga fighters battling i.s.i.l. forces. >> it provides an economy for the kurds, it provides a benefit to turkey, which has a big oil need, of course. and it's also a way of the putting the - you know, the dampers on kurdish ambitions within turkey itself. the kurds in iraq will not encourage that. >> in the latest development turkey has agreed to let u.s. war planes use the american air base to strike at i.s.i.l. targets in northern syria. the stated goal is