Muslim radicalization

For Muslim-Americans, there was a world before Sept. 11 and after. Now, the dual threats of extremism and atheism threaten them further. A group of friends in D.C. voice their frustrations, and hopes.

The Indiana-based group Reclamation Studios is hosting conversations online and posting a series of videos refuting the Islamic State ideology that they say has hijacked their faith.

A German-Syrian religious studies teacher was shocked when she heard that five of her former students had left Germany to join jihadist groups in Syria. "It felt like a personal defeat," she says.

Two of the men involved in the Paris attacks met in prison, where they transformed from small-time criminals to jihadists. France is now redoubling its effort to prevent radicalization in its prisons.

It began with messages sent through an anonymous app. Slowly, the Denver-area girls were lured in, until one day they weren't at school. One girl's dad quickly realized why: They were flying to Syria.

Manfred Karg's 19-year-old son, a convert to Islam, is one of at least 60 Germans killed fighting alongside ISIS militants. Karg says efforts to stop the flow to Syria and Iraq are taking too long.