“The necks of your citizens will be cut, so long as you participate in the Crusade against Islam and the Muslims. #UK #US #AlanHennig.” (Tweet) Hayes Brown, “Turns Out It’s Pretty Hard To Shut Down Jihadi Twitter,” BuzzFeed News, November 6, 2014, http://www.buzzfeed.com/hayesbrown/turns-out-its-pretty-hard-to-shut-down-jihadi-twitter#.nxlA42mvn.