When a person craving violence is drawn in by Islamic State ideology offering them glory and a sense of belonging, it provides a volatile mix that can lead to the kind of massacre seen in the south of France last week, experts say.
US investigators have questioned the wife of the gunman who killed 49 people at an Orlando gay nightclub, the FBI said on Wednesday, and a law enforcement source said she could face criminal charges if there is evidence of any wrongdoing.
FBI Director James Comey said there were "strong indications" Orlando nightclub attacker Omar Mateen had been radicalised in part through the internet but federal authorities still are working to determine his exact motives.
