White roses adorn the statue of Richard III outside Leicester Cathedral before the reinterment ceremony of King Richard III. WPA Pool/Getty Images hide caption

itoggle caption WPA Pool/Getty Images

Lamya Kaddor teaches Islamic studies in Germany. She's written a new book, Zum Toeten Bereit (Ready To Kill), about the experience of having five former students flee to Syria to join jihadist groups. Andre Zelck/Courtesy of Piper Verlag GmbH hide caption

itoggle caption Andre Zelck/Courtesy of Piper Verlag GmbH