Bin Laden and al-Zawahiri top the FBI's list
1. Osama Bin Laden: Born in Saudi Arabia, 1957. Head of the al-Qaeda network and prime suspect in the attacks on New York and Washington; also wanted in connection with the 1998 bombings of the US embassies in Kenya and Tanzania which killed more than 220 people. Believed to be in Afghanistan.
2. Ayman al-Zawahiri: Born in Egypt, 1951. Founder of the Egyptian Islamic Jihad movement. Believed to serve as an adviser to Bin Laden. Wanted in connection with the US embassy bombings in Africa. Believed to be in Afghanistan.
3. Abdelkarim Hussein Mohammed al-Nasser: Born in Saudi Arabia. Charged with the Khobar Towers bombing in Doha, Saudi Arabia, in 1996, in which 19 American servicemen died.
4. Abdullah Ahmed Abdullah: Born in Egypt, 1963. Charged in connection with the US embassy bombings in Africa. Believed to be in Afghanistan.
5. Muhsin Musa Matwalli Atwah: Born in Egypt, 1964. Wanted in connection with the US embassy bombings in Africa. Believed to be in Afghanistan.
6. Ali Atwa: Born in Lebanon, 1960. Suspected member of the Lebanese Hezbollah organisation. Wanted in connection with the hijacking of TWA flight 847 from Athens to Rome in 1985, in which an American citizen was killed. Believed to be in Lebanon.
7. Anas al-Liby: Born in Libya, 1964. Wanted in connection with the bombings of the US embassies in Africa. Recently lived in the UK, believed to currently be in Afghanistan.
8. Ahmed Khalfan Ghailani: Born in Tanzania, 1974. Charged in connection with the US embassy bombings in Africa.
9. Hasan Izz-al-Din: Born in Lebanon, 1963. Suspected member of the Lebanese Hezbollah organisation. Charged in connection with the hijacking of TWA flight 847. Believed to be in Lebanon.
10. Ahmed Mohammed Hamed Ali: Born in Egypt, 1965. Thought to have previously worked in agriculture. Wanted in connection with the US embassy bombings in Africa. Believed to be in Afghanistan.
11. Fazul Abdullah Mohammed: Born in Comoros Islands. Believed to be a computer expert. Charged in connection with the US embassy bombings in Africa.
12. Imad Fayez Mugniyah: Born in Lebanon, 1962. Believed to be head of the security apparatus of the Lebanese Hezbollah. Wanted in connection with the hijacking of TWA flight 847 in 1985. Thought to be in Lebanon.
13. Mustafa Mohammed Fadhil: Born in Egypt, 1976, Fadhil has Egyptian and Kenyan citizenship. Charged in connection with the US embassy bombings in Africa.
14. Sheikh Ahmed Salim Swedan: Kenyan citizen. Charged in connection with the US embassy bombings in Africa.
15. Abdul Rahman Yasin: Born in Indiana, 1960. Wanted in connection with the bombing of the World Trade Center in New York in 1993, in which six people died.
16. Fahid Mohammed Ally Msalam: Born in Kenya, 1976. Wanted in connection with the US embassy bombings in Africa.
17. Ahmad Ibrahim al-Mughassil: Born in Saudi Arabia, 1967. Wanted in connection with the Khobar Towers bombing in Saudi Arabia in 1996.
18. Khalid Shaikh Mohammed: Kuwaiti citizen. Wanted in connection with a plot to bomb US airliners flying to the US from Southeast Asia in January, 1995.
19. Mohammed Atef: Egyptian citizen. Believed to be Bin Laden's second-in-command in al-Qaeda. Wanted in connection with the US embassy bombings in Africa.
20. Ali Saed Bin Ali El-Hoorie: Born in Saudi Arabia, 1965. Charged in connection with the Khobar Towers bombing.
21. Saif al-Adel: Egyptian citizen. Believed to be a high-ranking member of al-Qaeda. Wanted in connection with the US embassy bombings in Africa. Believed to be in Afghanistan.
22. Ibrahim Salih Mohammed al-Yacoub: Born in Saudi Arabia, 1966. Charged in connection with the Khobar Towers bombing.