Fuente: Al-Qaeda's remaining leaders (BBC, May 2, 2011)
Abu Yahya al-Libi, also known as Hasan Qayid and Yunis al-Sahrawi, is thought to have been a member of the Libyan Islamic Fighting Group (LIFG) before he allied himself to Osama Bin Laden.
He has since emerged as al-Qaeda's leading theologian, and most visible face on video, surpassing Ayman al-Zawahri in recent years. Libi is believed to have spent five years as a religious student in Mauritania in the 1990s. He claims he was captured by Pakistani forces in 2002 and then sent to the US military airbase at Bagram in Afghanistan, from where he escaped in July 2005 along with three other al-Qaeda members. Al-Qaeda has named Libi as a field commander in Afghanistan, though he has styled himself in his many videos as a theological scholar, and spoken on a variety of global issues of importance to the group.
Khalid al-Habib, thought to be either Egyptian or Moroccan, was identified in a November 2005 video as al-Qaeda's field commander in south-east Afghanistan, while Abd al-Hadi al-Iraqi was named as its commander in the south-west.
Habib seems to have assumed overall command after the latter's capture in 2006. He was described as al-Qaeda's "military commander" in July 2008. US military officials say he oversees al-Qaeda's "internal" operations in Afghanistan and northern Pakistan. Habib may be operating under an assumed identity, according to some analysts. One of his noms de guerre is believed to be Khalid al-Harbi.
In August 2010, the FBI said Adnan Gulshair el Shukrijumah had taken over as chief of al-Qaeda's "external operations council". Having lived for more than 15 years in the US, it is the first time a leader intimately familiar with American society has been placed in charge of planning attacks for the group outside Afghanistan.
A Libyan, Atiyah Abd al-Rahman joined Osama Bin Laden in Afghanistan as a teenager in the 1980s.
Since then, he has gained considerable stature in al-Qaeda as an explosives expert and Islamic scholar. He retreated with Bin Laden to the mountainous Afghanistan-Pakistan border region in late 2001, and has since become a link to other Islamist militant groups in the Middle East and North Africa. In June 2006 the US military recovered a letter he wrote to the late Abu Musab al-Zarqawi, the Jordanian who ran al-Qaeda in Iraq, chastising him for alienating rival insurgent groups and attacking Shia Muslims. It warned Zarqawi that he could be replaced if he did not change his ways. He is said to have successfully brokered a formal alliance with the Algerian Salafist Group for Preaching and Combat (GSPC), which changed its name to al-Qaeda in the Islamic Maghreb.
An Egyptian in his late 30s, Saif al-Adel is the nom de guerre of a former Egyptian army colonel, Muhamad Ibrahim Makkawi. He travelled to Afghanistan in the 1980s to fight Soviet forces with the mujahideen.
Adel was once Osama Bin Laden's security chief, and assumed many of military commander Mohammed Atef's duties after his death in a US air strike in November 2001. He is suspected of involvement in the 1998 US embassy bombings in East Africa, training the Somali fighters who killed 18 US servicemen in Mogadishu in 1993, and instructing some of the 11 September 2001 hijackers. In 1987, Egypt accused Adel of trying to establish a military wing of the militant Islamic group al-Jihad, and of trying to overthrow the government. Following the invasion of Afghanistan, Adel is believed to have fled to Iran with Suleiman Abu Ghaith and Saad Bin Laden, a son of the late al-Qaeda leader. They were allegedly then held under house arrest by the Iran's Islamic Revolutionary Guard Corps (IRGC). Iran has never acknowledged their presence. Several letters and internet statements bearing Adel's name or aliases have been released since 2002, leading analysts to believe he is still in contact with al-Qaeda's leaders in the region. Recent reports say Adel may have been released and made his way to northern Pakistan, along with Saad Bin Laden.
Mustafa Hamid, the father-in-law of Saif al-Adel, served as instructor in tactics at an al-Qaeda camp near Jalalabad and is the link between the group and Iran's government, according to the US.
After the fall of the Taliban, he is said to have negotiated the safe relocation of several senior al-Qaeda members and their families to Iran. In mid-2003, Hamid was arrested by the Iranian authorities.
Saad Bin Laden, one of Osama Bin Laden's sons, has been involved in al-Qaeda activities. In late 2001, he helped his relatives flee to Iran.
He made key decisions for al-Qaeda and was part of a small group of al-Qaeda members involved in managing the organisation from Iran, according to US officials. He was arrested by Iranian authorities in early 2003, but recent reports say he may have been released and made his way to northern Pakistan.
US officials said an "adult son" of Osama Bin Laden's was killed alongside him in the raid in Abbottabad in May 2011. It is not known if it was Saad.
Hamza al-Jawfi, a Gulf Arab, is believed by some to have become al-Qaeda's external operations chief after the death of Abu Ubaida al-Masri from hepatitis C in December 2007. However, the FBI has said this year that Adnan el Shukrijumah had assumed this role.
Matiur Rehman is a Pakistani militant who has been identified as al-Qaeda's planning chief. He is said to have been an architect of the foiled "liquid bomb" plot to explode passenger aircraft over the Atlantic in 2006.
Little is known about Abu Khalil al-Madani, who was identified as a member of al-Qaeda's Shura council in a July 2008 video. His name suggests he is Saudi.
An Egyptian chemist, Midhat Mursi al-Sayid Omar has allegedly overseen al-Qaeda's efforts to develop chemical and biological weapons.
Also known as Abu Khabab, he left Egypt to fight the Soviets in the 1980s. A fellow mujahideen says he was slow to join al-Qaeda because he disagreed with the group's central strategy and was not an ally of Ayman al-Zawahiri, but changed his mind in part because he needed the money. Mursi was a trainer at al-Qaeda's Derunta camp in Afghanistan when it was set up in the late 1990s. In addition to teaching courses on conventional explosives, he wrote manuals on how to make toxic weapons and conducted a variety of experiments as part of Project al-Zabadi, or "curdled milk". The US believes he may be living in Pakistan, although other reports suggest he escaped to the Pankisi Gorge in the Caucasus region in 2001. US intelligence officials do not believe he occupies a senior leadership position.
Fahd al-Quso is wanted in connection with the 2000 bomb attack on the USS Cole in Aden, which resulted in the deaths of 17 US sailors.
In April 2003, he was being held by the Yemeni authorities in connection with the attack when he escaped. He was recaptured 11 months later, but was released from prison early in 2007 despite US protests.
It was thought that he was still in Yemen, but reports say he may have been killed by a US drone strike in September in North Waziristan, Pakistan.
Adam Gadahn, a US citizen who grew up in California, has emerged as a high-profile propagandist for al-Qaeda, appearing in a string of videos.
After converting to Islam as a teenager, he moved in 1998 to Pakistan and married an Afghan refugee. Gadahn performed translations for al-Qaeda and become associated with al-Qaeda's captured field commander, Abu Zubaydah. He is also thought to have later trained at a militant camp in Afghanistan. In 2004, the US justice department named him as one of seven al-Qaeda operatives planning imminent attacks on the US. Shortly afterwards, he appeared in a video on behalf of al-Qaeda, identifying himself as "Azzam the American". In September 2006, he appeared in a video with Ayman al-Zawahiri and exhorted his fellow Americans to convert to Islam and support al-Qaeda.
The next month, Gadahn become the first US citizen to be charged with treason since World War II. The indictment said he had "knowingly adhered to an enemy of the United States... with intent to betray the United States". A $1m bounty was placed on his head.
Analysts say Gadahn is not part of al-Qaeda's senior leadership, and does not hold any operational or ideological significance.
Wuhayshi, a former aide to Osama Bin Laden, is the leader of al-Qaeda in the Arabian Peninsula (AQAP), which was formed in 2009 in a merger between two offshoots of al-Qaeda in Saudi Arabia and Yemen.
US counter-terrorism officials have said it is the "most active operation franchise" of al-Qaeda beyond Pakistan and Afghanistan. Wuhayshi, who is from the southern Yemeni governorate of al-Baida, spent time in religious institutions before travelling to Afghanistan in the late 1990s. He fought at the battle of Tora Bora in December 2001, before escaping over the border into Iran, where he was eventually arrested. He was extradited to Yemen in 2003. In February 2006, Wuhayshi and 22 other suspected al-Qaeda members managed to escape from a prison in Sanaa. Among them were also Jamal al-Badawi, the alleged mastermind of the USS Cole bombing, and Qasim al-Raymi, al-Qaeda's in the Arabian Peninsula's military commander.
After their escape from prison, Wuhayshi and Raymi are said to have overseen the formation of al-Qaeda in Yemen, which took in both new recruits and Arab fighters returning from Iraq and Afghanistan.
The group claimed responsibility for two suicide bomb attacks that killed six Western tourists before being linked to the assault on the US embassy in Sanaa in 2008, in which 10 Yemeni guards and four civilians died.
Four months later, Wuhayshi announced in a video the merger of the al-Qaeda offshoots in Yemen and Saudi Arabia to form "al-Qaeda of Jihad Organisation in the Arabian Peninsula".
The group's first operation outside Yemen was carried out in Saudi Arabia in August 2009 against the kingdom's security chief, Prince Mohammed bin Nayef, though he survived.
It later said it was behind the attempt to blow up a US passenger jet as it flew into Detroit on 25 December 2009. A Nigerian man charged in relation with the incident said AQAP operatives had trained him.
A radical American Muslim cleric of Yemeni descent, Awlaki has been linked to a series of attacks and plots across the world - from 11 September 2001 to the shootings at Fort Hood in November 2009.
Since going on the run in Yemen in December 2007, Awlaki's overt endorsement of violence as a religious duty in his sermons and on the internet is thought to have inspired new recruits to Islamist militancy. US officials say he is also a leader of al-Qaeda in the Arabian Peninsula, an offshoot of the militant network in Saudi Arabia and Yemen, and helped recruit Umar Farouk Abdulmutallab, the Nigerian accused of attempting to blow up an airliner as it flew into Detroit on 25 December 2009. Following the failed attack, President Barack Obama took the extraordinary step of authorising the Central Intelligence Agency to kill him. Soon afterwards, Awlaki survived an air strike in southern Yemen. Awlaki is currently thought to be hiding in the mountainous governorates of Shabwa and Marib, under the protection of the large and powerful Awalik tribe, to which he belongs. His family say he is not a terrorist.
A former university science student and infamous bomb-maker, Abdelwadoud is the leader of al-Qaeda in the Islamic Maghreb (AQIM).
He became leader of the head of the Algerian Islamist militant organisation, the Salafist Group for Preaching and Combat (GSPC), in mid-2004, succeeding Nabil Sahraoui after he was killed in a major army operation. After university in 1995, Abdelwadoud joined the Armed Islamist Group (GIA), a precursor to the GSPC which shared its aim of establishing an Islamic state in Algeria. He is said to have become a member of the GSPC in 1998. Abdelwadoud, whose real name is Abdelmalek Droukdel, was one of the signatories to a statement in 2003 announcing an alliance with al-Qaeda. In September 2006, the GSPC said it had joined forces with al-Qaeda, and in January 2007 it announced it had changed its name to "al-Qaeda in the Land of the Islamic Maghreb" to reflect its allegiance. Abdelwadoud said he had consulted Ayman al-Zawahiri about the group's plans.
Three months later, 33 people were killed in bomb attacks on official buildings in Algiers. Abdelwadoud allegedly supervised the operation. That December, twin car bombs killed at least 37 people in the capital.
The ambitions of the group's leadership widened, and it subsequently carried out a number of attacks across North Africa. It also declared its intention to attack Western targets and send jihadis to Iraq. Westerners have also been kidnapped and held for ransom; some have been killed.
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