8 bloody terror attacks in U.S. in 18 months have 1 thing in common

Somali refugee Abdul Ali Artan, suspect in the Ohio State University campus stabbing spree on Nov. 28, 2016 (Photo: Twitter/The Lantern) When Abdul Ali Artan tried to run over a crowd of helpless students at Ohio State University, then got out of his car and slashed as many as he could with a butcher knife, media…