As international attention focuses on the Syrian regime of President Bashar al-Assad, cfr.org profiles some of the nation’s top leaders.

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.

A profile of the terrorist organization based in the southern Philippines.

A profile of Jamaat al-Islamiyya.

An increasingly chaotic political situation in Darfur may require a more inclusive round of negotiations than currently envisioned.