Book Examines Islamic State's History, Tactics, Vision

In his new book, William McCants, an analyst on violent extremism and radical Islam, says the focus on state building, the use of fear and an apocalyptic vision are the reasons why Islamic State failed when it was established almost a decade ago, but also why the terrorist group is now meeting with success. VOA's Keida Kostreci reports.

© La Voix de l'Amérique - mercredi 23 septembre 2015