The anti-American cleric Muqtada al-Sadr, virtually unknown before the collapse of Saddam Hussein’s government, has leveraged his family name to become one of the most influential Shiite leaders in m…

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

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

From his exile in Syria, Khaled Meshal, the top ranked member of Hamas, exercises leadership and serves as the group’s diplomatic envoy.

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.