 In 2011, Obama presided over a mission that led to the death of Osama bin Laden, the organizer of the September 11 attacks.The number of prisoners at the Guantanamo Bay detention camp fell dramatically during Obama's tenure, but, despite Obama's hopes to close the detention camp, 41 inmates remained at Guantanamo by the time that Obama left office.The Obama administration made increased use of drone strikes, particularly in Pakistan, targeting Al-Qaeda leaders such as Anwar al-Awlaki.