Thanks to the lone wolf shootings in Las Vegas, Americans will need to accept heightened security measures when checking in to any hotel.
Attacks this summer on counterprotesters in Charlottesville, Virginia, and an empty Air Force recruiting station in Oklahoma had the hallmarks of terrorist attacks but weren't prosecuted as such.
The Unabomber: Between 1978 and 1995, Theodore Kaczynski's ingeniously designed homemade bombs killed three people and injured 23 others.
More than half of the 82 individuals inspired by a foreign terrorist group to perpetrate or attempt a terrorist attack in the U.S. were American citizens born in the States.
The lone wolf terrorist: Arguably the most difficult kind of attacker to identify and predict and prevent from taking action.
Counterterrorism experts state that the Islamic State group is expanding its reach through social media via short and flashy recruitment videos.
After one year, there is still no trial date for a Ohio man who allegedly bought weapons for a 'lone wolf' attack on the U.S. Capitol.
Terrorism in the Homeland: A man said he was acting in the name of Islam when he fired more than a dozen shots at a police officer at point-blank range.