Who are AQAP?

Al-Qaeda in the Arabian is a militant Islamist organization, primarily active in Yemen and Saudi Arabia. AQAP was formed in January 2009 from a merger of al Qaeda's Yemeni and Saudi branches. It's widely believed to be the most dangerous of all Al Qaida branches. It's leadership has been responsible for several high profile bomb attempts against the U.S. It has also has been a frequent target.