The 9/11 Accused

Khalid Sheik Mohammed

Mohammed is a Pakistani raised in Kuwait but educated in America. The US administration claims he masterminded the September 11 2001 attacks. He was subjected to waterboarding during questioning and confessed to roles in 30 plots other than 9/11, including planned attacks on Big Ben and Heathrow airport and the beheading of the Wall Street Journal reporter Daniel Pearl in Pakistan, according to transcripts at Guant?namo Bay. Mohammed was believed to be al-Qaida's third most senior member when he was arrested in Rawalpindi, Pakistan, in March 2003.

Ramzi bin al-Shibh

Shibh is a Yemeni national who at one stage lived with the September 11 ringleader, Mohammed Atta. Allegedly the main intermediary between the hijackers and al-Qaida leaders, Shibh has been described by officials as a "key facilitator" as well as a "lead operative" in a plan to crash hijacked airliners at Heathrow airport. In an interview with an al-Jazeera reporter in 2002, he showed souvenirs of the 9/11 planning, including a flight instruction book signed by Atta.

Ali Abd al-Aziz Ali

Ali, also known as Ammar al-Baluchi, is a nephew of Khalid Sheik Mohammed and a cousin of the jailed 1993 World Trade Centre bomber Ramzi Youssef. He stands accused of being Mohammed's 9/11 lieutenant. US intelligence officials allege that Ali delivered funds to the 9/11 hijackers and later helped Mohammed communicate with Richard Reid, the so-called shoe bomber, who is serving a life sentence in a US jail for his plot to kill 198 people on a transatlantic flight in 2001.

Mustafa Ahmed al-Hawsawi

Allegedly Ali's assistant, he has also been accused of being an al-Qaida paymaster. Financial links have been found between Hawsawi, other terror suspects and some of the 9/11 hijackers, US intelligence says. It is claimed he helped arrange travel for some of them.

Walid bin Attash

Attash, also known as Khallad, is a Yemeni raised in Saudi Arabia. He was allegedly selected as one of the hijackers, but was prevented from taking part when he was briefly arrested in Yemen earlier in 2001. He is said to have served as Osama Bin Laden's bodyguard. According to the Pentagon, he has admitted masterminding the bombing of the American destroyer USS Cole in Yemen in 2000, which killed 17 sailors. Attash also said he helped plan the 1998 bomb attacks on the US embassies in Kenya and Tanzania that killed 213 people, according to court documents at Guant?namo.