This week, The Cipher Brief's Suzanne Kelly spends 15 Minutes with Ali Soufan. Ali is a former FBI special agent, who recently wrote The Anatomy of Terror: From the Death of Bin Laden to the Rise of the Islamic State. What's unique about the book is that he wrote it like a novel, to bring the readers into the world of Bin Laden and help them better understand it. So how did he come up with the idea?