UVA expert: FBI faces tough challenge in finding domestic terrorists and preventing their attacks

As the FBI investigates whether the weekend stabbing attack in Roanoke County is terrorism-related, experts say finding U.S. residents who might commit acts of terrorism is a difficult process — especially when there are no previous signs of violence. WLNI’s Evan Jones has the story.

08-24 Domestic Terrorism Wrap-WLNI-WEB