presence in turkey. we've seen the group target u.s. military in the past. in fact, one of the telltale signs of the group is it targets u.s. deployment in turkey whenever the united states sends troops and hardware into turkey. >> reporter: experts add that more u.s. support for turkey would likely result in more violence. shep? >> shepard: but it's not like support for turkey's going away. >> reporter: no, because turkey is a very key nato ally and a key partner in the middle east. if you look at the region, it kind of makes sense. you've got u.s. military action in that region that turkey has supported. they've provided air basees for u.s. jets. turkey also serves as kind of a buffer zone to help stop terrorism and islam i can extremism. if you look at the u united stas chess board, turkey is ary region. >> turkey is the only country that borders both iran, iraq, and syria. whatever the u.s. policy is,