back in belgium younnes is stuck in a secular pluralistic world he despices. he is unrepentant about his time with isis in syria. do you ever regret leaving? >> i regret coming back. s >> you do? >> yes. i want to live underneath an sls sof sri. is that a crime? no. >> that profound detachment and disdain is what frightens authorities. while they can guard the streets they cannot guard the internet where any radical can open a recruitment center. to see how it works we used a consultant to set up a facebook