May 2011: Usama bin Laden, leader of Al Qaeda, was shot during a U.S. commando operation at Abbottabad, a city just north of Islamabad, Pakistan.
June 2011: Fazul Abdullah Mohammed, Al Qaeda's most senior operative in East Africa and who planned the 1998 US embassy bombings in Kenya and Tanzania, was killed in Somalia.
June 2011: Ilyas Kashmir, Al Qaeda's military operations chief in Pakistan, was believed to have organized a 2006 suicide bombing against the U.S. consulate in Karachi that killed four people, including an American diplomat. He was killed by a U.S. drone.
August 2011: Abd al-Rahman, a Libyan who in the last year had taken over as Al Qaeda’s top operational planner, was killed by a drone strike.
Sept. 30: Anwar al-Awlaki, a U.S.-born cleric killed in Yemen, planned and directed attacks on U.S. interests as "chief of external operations" for Al Qaeda's Yemen-based wing. He was killed during a joint operation by CIA officials and the U.S. military.
In the past few months, the U.S. has had some major success in the global fight against terrorism, taking down some top targets. Here's a look: