he was never tempted to go to syria, but he and his wife rashida understand why their son marat was. translated ): the islamic call i was talking about, the one in every muslim's soul, is hidden, deep down. it's like a light in someone's heart. >> reporter: nurmagometov lives deep in the caucasus mountains where nearly-dried-up rivers meander through 1,000-foot high cliffs, and beyond ancient rock formations, isolated dirt roads connect secluded villages. one of those villages is karata. official population is 4,000, but residents say it's half that size. this area is nearly 100% muslim. before friday prayers, men greet each other in the small town center. there are few young people, in part because this small village sent as many as two dozen to isis, al qaeda, and the wars in syria and iraq. that's her? that's your daughter. >> da. >> reporter: amina kondakova is a muslim convert. she shows me photos from a happier time. she says they grew up traditional and comfortable. and then, two years ago, her daughter miryam and her son ali askhat told her they were going on vacation. instea