they think it's the time of their life. they think that they are part of a historical event. changing the whole middle east. >> among them were americans. >> i met many americans. i met many germans and french people and english people, but many americans. guys from new jersey. >> there were also american weapons. soldiers carry them like a badge of honor, even the children. >> how old are you? >> these child soldiers, 12 and 13 years old, now go to what isis calls schools. >> they start a new school system, which i found is completely wrong, completely crazy. but it's a system. >> isis officials trotted out a few prisoners for todenhofer to talk to.