. >> henri barkey. thank you for joining us.e'll talk more about turkey's crucial war of the fight against i.s.i.l. this is a special "on target" from istanbul. istanbul. h >> welcome back. "on target" is in istanbul, turkey tonight. turkey is central to the fight against i.s.i.l. but it is also central to the refugee crisis. fighters come through parts of turkey to get through the porous border, through many of those same porous borders into turkey, this is a country that now has more than 2 million syrian refugees. it is a new problem for turkey. turkey's got a decades-old problem though and that is with kurds who want to have their own austerity or at least a lot more autonomy inside. it is a complicated story and that is complicated by turkey's history. mary snow has that history. >> as world leaders at the g20 summit concentrate on the paris attacks, turkey, only muslim country that is a member of nato. >> we have about 30,000 foreign fighters from more than 90 different countries. the greatest majority of them came through

. >> henri barkey. thank you for joining us. we'll talk more about turkey's i.s.i.l. this is a special "on target" from istanbul. >> at 9:30 - "america tonight" - top investigative reporting, uncovering new perspectives. >> everything that's happening here is illegal. >> then at 10:00 - it's "reports from around the world". >> let's take a closer look. >> antonio mora gives you a global view. >> this is a human rights crisis. >> and at 11:00 - "news wrap-up". clear... concise... complete. >> welcome back. "on target" is in istanbul, turkey tonight. turkey is central to the fight against i.s.i.l. but it is also central to the refugee crisis. fighters come through parts of turkey to get through the porous border, through many of those same porous borders into turkey, this is a country that now has refugees. it is a new problem for turkey. turkey's got a decades-old problem though and that is with kurds who want to have their own austerity or at least a lot more autonomy inside. it is a complicated story and that is complicated by turkey's history. mary snow has that his