Although the media has given extensive coverage to possible jihadist sleeper cells, they are too complicated and expensive for groups like al Qaeda and the Islamic State to operate.
Sep 18, 2014 | 03:00 GMT
Volunteers from abroad have flocked to the battlefields of Iraq and Syria in numbers unseen since the end of the Cold War, but throughout history foreign combatants have been a key part of warfare.
Sep 17, 2014 | 04:15 GMT
The U.S. role against the jihadist group is small compared to the work to be done by the region's four main powers.
Sep 14, 2014 | 08:08 GMT