Learn more about:
• Osama bin Laden	• Ayman al-Zawahiri	• Saif al-Adil
• Abd al Aziz al-Jamal	• Abu Mohamed al-Masri	• Abu Musab Zarqawi
• Mahfouz Ould Walid	• Sa'ad bin Laden

Osama bin Laden
The Saudi-born Islamic militant leader is the prime suspect in the attacks on the World Trade Center and Pentagon. Bin Laden, who was born on July 28, 1957, fought in Afghanistan against the Soviet invasion and once received CIA training. But in the mid-1980s he formed his own, more radical group - al-Qaida -- that eventually turned its attention to American, Israeli and moderate Arab targets. He was named as a "supporting conspirator" in a Dec. 11 indictment of Zacarias Moussaoui, a French citizen of Moroccan descent who U.S. authorities say was an active participant in the Sept. 11 plot.

For more information on bin Laden, click here.

Ayman al-Zawahiri
Al-Zawahiri was born June 19, 1951, in Giza, Egypt, and is thought to be an Egyptian national. A former leader of the Egyptian Islamic Jihad, he is now a close associate of bin Laden and no. 2 in the al-Qaida hierarchy, according to U.S. officials. He appeared with bin Laden in a videotape released on Oct. 7, shortly after the first military strikes in Afghanistan, saying, "America is the head of criminals by creating this Israel, this continuous crime for 50 years." Al-Zawahiri's family is believed to have been killed in a U.S. airstrike in Afghanistan. He was named as a "supporting conspirator" in a Dec. 11 indictment of Zacarias Moussaoui, a French citizen of Moroccan descent who U.S. authorities say was an active participant in the Sept. 11 plot.

Saif al-Adil
Al-Adil was born circa 1963 in Egypt and is thought to have retained his Egyptian citizenship. He is said to be responsible for bin Laden's security and is believed to have assumed some of Mohammed Atef's military planning duties after the senior bin Laden lieutenant was reportedly killed in U.S. airstrikes in mid-November 2001. U.S. authorities say he helped train the Sept. 11 hijackers. He also has been indicted for conspiracy in the 1998 U.S. embassy bombings in Kenya and Tanzania.

Abd al Aziz al-Jamal
An aide to Ayman al-Zawahri who, like al-Adil, is thought to have assumed some of Mohammed Atef's military duties.

Abu Mohamed al-Masri (aka Abdullah Ahmed Abdullah)
An Egyptian who U.S. officials say is a top al-Qaida trainer and operational planner, al-Masri has been identified as a leader of the terror cell in Kenya that carried out the 1998 attack on the U.S. Embassy in Nairobi. He was listed in early 2003 as no. 5 in the al-Qaida hierarchy by U.S. intelligence experts.

Abu Musab Zarqawi
A Jordanian, reported to be an expert in mixing poisons, Zarqawi was convicted in absentia in connection with plot to bomb tourist spots in Amman. Later described as a senior al-Qaida leader, he reportedly sought medical care and refuge in Iraq after being seriously injured during the war in Afghanistan. U.S. officials used his presence in Baghdad to argue that al-Qaida and Iraqi President Saddam Hussein are linked. But CIA Director George Tenet has said that Zarqawi's organization operates independently from al-Qaida, though it has received some funding from bin Laden's network.

Mahfouz Ould Walid (aka Abu Hafs the Mauritanian)
A native of the African nation of Mauritania, Walid was said by the U.S. to have been killed in an airstrike in Afghanistan in January 2002, but he has recently been placed among dozens of al-Qaida members being sheltered in Iran. He was listed by the Pentagon as one of bin Laden's top aides in the immediate aftermath of the Sept. 2001 terror attacks.

Sa'ad bin Laden
One of Osama bin Laden's 20 children, he is believed to be active in al Qaida, though his role in the organization is not clear.

Amin al-Haq (aka Muhammad Amin)
Al-Haq, an Afghan national who was born circa 1960 in the Nangahar province, is said to be the security coordinator for bin Laden.

Ahmad Sa'id al-Kadr (aka Abu Abd Al-Rahman Al-Kanadi and Abu Abdurrahman)
Al-Kadr, born March 1, 1948, in Cairo, is believed to be an aide to bin Laden. He is believed to hold dual Egyptian and Canadian citizenships.

Thirwat Salah Shihata
The second-in-command, after Ayman al-Zawahri, of Egyptian Islamic Jihad, Shihata has been sentenced to death in absentia twice in Egypt for terrorist activities

Saqar al-Jadawi
Born circa 1965 and thought to be a Yemeni and Saudi national, al-Jadawi is described as an aide to bin Laden.

Bilal Bin Marwan
Marwan, a Saudi born circa 1947, is described as a senior lieutenant to bin Laden.

Sulaiman Abu Ghaith
A Kuwaiti and former school teacher, Ghaith emerged as al-Qaida's spokesman after the Sept. 2001 terror attacks.

Abu Basir al-Yamani
A bin Laden aide.

Abu Zubair al-Haili
Described as an al-Qaida operational commander

Zaid Khayr
Described as an al-Qaida operational commander