Photo Gallery Islamists and Social Media

In the wake of the Paris attacks, authorities are becoming increasingly concerned about Islamic State's skillful use of the Internet. But so far, European attempts to counteract it have been frustratingly ineffective.
1 / 4
Foto: Islamistisches Propagandavideo
2 / 4
Foto: Nicolas Armer/ dpa
3 / 4
Foto: Ralf Roeger/ dpa
4 / 4
Foto: Boris Roessler/ dpa