Al-Qaida in the Arabian Peninsula
- Formed by a 2009 merger of al-Qaida's Yemen and Saudi branches
- Led by Nasir al-Wahishi, former assistant to Osama bin Laden
- Established sanctuaries in Yemen, overrunning entire towns and villages
- Was behind unsuccessful underwear bomb plot on Christmas Day 2009
- Was behind foiled 2010 plot to send mail bombs hidden in toner cartridges to the US