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