- guardian.co.uk, Sunday September 15 2002 01.19 BST
Osama bin laden: The 45-year-old leader of al-Qaeda. Probably still alive, as his death could not have been kept secret for long. Still hiding in the remote and lawless border lands between Pakistan and Afghanistan.
Ayman al-Zawahiri: Egyptian-born paediatrician who is a major ideological influence on bin Laden. Last sighting, unconfirmed, in eastern Afghanistan in March. Believed to be still alive and probaby with, or close to, bin Laden.
Khaled Mohammed Sheikh: Senior organiser and ideologue, believed to be still in Karachi or nearby. Responsible for running al-Qaeda operatives out of Pakistan to the Middle East.
Taken alive
Mohamed Mamduh Salim: Dedicated and experienced organiser. Played key role in 1998 bombings in Kenya and Tanzania. Unconfirmed reports that he was arrested in Karachi last week.
Abu Zubaydah: Young Palestinian and head of the al-Qaeda network following the Afghan war. Captured in eastern Pakistan town of Faisalabad in March in joint FBI/Pakistani operation.
Dead
Mohammed Atef: Chief military organiser of al-Qaeda. Another Egyptian. Killed by a US Hellfire missile strike in November last year.
