“[On Choudary's membership of the internationally proscribed Islamist group Al Muhajiroun (The Emigrants)] Choudary ... is the group's former leader. He frequently appears on cable news, as one of the few people producers can book who will defend the Islamic State vociferously, until his mike is cut. He has a reputation in the United Kingdom as a loathsome blowhard, but he and his disciples sincerely believe in the Islamic State and, on matters of doctrine, speak in its voice. Choudary and the others feature prominently in the Twitter feeds of Islamic State residents...”