Key developments concerning the Islamic extremist group Al-Qaeda since the death of its leader Osama bin Laden a year ago:
May 2: US President Barack Obama announces that bin Laden has been killed by US special forces at a house where he had been hiding out near the Pakistani capital Islamabad. Obama also announces that the body of the Al-Qaeda leader has been buried at sea from a US warship.
Al-Qaeda threatens revenge and vows to continue the holy war (jihad).
The killing causes tension between Washington and Islamabad, with top American officials accusing Pakistan of working for both sides.
May 13: In Pakistan, 98 people are killed in a suicide attack in front of a police training centre at Shabqadar in the north-west, claimed by the Al-Qaeda-linked Taliban "to avenge Osama bin Laden".
May 29: In Yemen, hundreds of fighters claiming allegiance to Al-Qaeda take control of Zinjibar in the southern province of Abyan, before extending their control to neighbouring provinces. Fighting between the Al-Qaeda supporters and the army continues in Abyan province.
June 8: The presumed head of Al-Qaeda in east Africa, Comoros-born Fazul Abdullah, is killed in a shoot-out in the Somali capital Mogadishu. He was reportedly one of the main players in huge Al-Qaeda bomb attacks that hit US facilities in Kenya and Tanzania in 1998.
June 16: Al-Qaeda names Egyptian Ayman al-Zawahiri as its new chief following the killing of bin Laden. The order is issued in the name of the hitherto-unknown general command of the organisation. Zawahiri has been Al-Qaeda's number two for years.
July 26: The head of Al-Qaeda in the Arabian Peninsula, Nasser al-Wahishi, affirms his allegiance to Zawahiri.
August 22: The United States says that Al-Qaeda's number two leader Atiyah abd al-Rahman has been killed in a US drone attack in tribal Waziristan in Pakistan.
September 30: US-born Al-Qaeda cleric Anwar al-Awlaqi is reported killed in Yemen by a CIA drone strike. US intelligence officials believe Awlaqi was linked to a Nigerian student accused of trying to blow up a US airliner on December 25, 2009.
January 25: Obama says in his annual State of the Union address that thanks to the withdrawal of 50,000 soldiers from Iraq in the past year the army and intelligence services have been able to concentrate on combatting Al-Qaeda.
February 9: US missiles kill Al-Qaeda's chief in Pakistan, Badr Mansoor, who reputedly sent fighters to Afghanistan and ran a training camp in North Waziristan.
April 2: A Pakistani court convicts Osama bin Laden's three widows and two of his grown-up daughters of illegal residency, sentencing them to 45 days detention and ordering their deportation.
April 3: The United States names the founder of the Pakistan-based Islamist group Lashkar-e-Taiba, Hafiz Mohammad Saeed, as the second-most-wanted terrorist around the world. He is blamed for deadly attacks on the Indian city of Mumbai in 2008.