About the lone wolf terrorist threat.
President Donald Trump and his administration formulate their plans to combat terrorism, they will discover that dealing with the threat of lone wolf terrorism will prove to be the most difficult and frustrating part of any counterterrorism policy. Traditional counterterrorism measures—such as military, economic, and diplomatic actions—will not work against the individual terrorist. Neither will travel bans from various countries, since lone wolf attacks are equally likely to originate from individuals already residing in the United States as they are to originate from recent immigrants. A U.S. Department of Homeland Security draft document found that more than half of the eighty-two individuals inspired by a foreign terrorist group to perpetrate or attempt a terrorist attack in the United States were American citizens born in the States.
A lone wolf does not have to be inspired by a foreign terrorist group. Read article here