The president-elect's failure to grasp the complex factors that fuel extremism could doom his relationship to the Muslim world.
We may not know for years. But the answer is critical as France and its allies ready their response.
The centuries-old apocalyptic prophecies behind a new symbol of global jihad
In 2011, an upstart group in Damascus began charting a pluralistic future for the country. Now the organization is a shell of its former self.
Recovered documents portray Ayman al-Zawahiri, Osama bin Laden's replacement, as diligent and more involved than we might have thought
The war against al-Qaeda is over, but continuing to fight terrorism will require understanding what we did that worked - and what didn't