With the demise of the Islamic State, a revived al-Qaeda and its affiliates should now be considered the world’s top terrorist threat.

Violence attributed to Islamist groups has dramatically increased in sub-Saharan Africa over the past decade, and continues to infect new venues where it has been absent.

A man sits in the back of an army truck carrying victims of a bomb blast near a military barracks in Nigeria's capital Abuja December 31, 2010. (Afolabi Sotunde/courtesy Reuters) Last week, the Da…

Al-Qaeda in the Arabian Peninsula has emerged as one of the most dangerous al-Qaeda affiliates, strengthening amid political unrest in Yemen.