Western Europe’s burgeoning Islamic population continues to spark concerns about Muslim assimilation and a cultural divide.

Ayman al-Zawahiri, now America’s most wanted terrorist, took over as the head of al-Qaeda in June 2011 after the killing of erstwhile head Osama bin Laden.

Financial pressures have weakened al-Qaeda’s tactical abilities, but analysts say affiliated networks are finding new ways to raise and spend money, complicating efforts to squeeze a savvy foe.

The crisis following Iran’s presidential vote cast a new light on the country’s hotly contested media space. A crackdown has limited independent reporting but other sources remain as channels for dis…

A profile of the Algerian terrorist organization, Armed Islamic Group (GIA).