Saudi Arabian criminal who was sent to Guantanamo Bay for his role in the 2001 attacks on the World Trade Center. Charges against him were dropped in 2009 following controversy surrounding the interrogation techniques used to attain his confession.
He flew from Dubai to Florida in August 2001 but was sent back on suspicion that he intended to live in the United States as an illegal immigrant.
The Department of Defense's Susan Crawford admitted that torture had been used in interrogating him, marking the first time a representative of the Bush administration admitted to such actions at Guantanamo Bay.
He is one of eight children born to his parents.
He and Mohamed Atta were co-conspirators in the September 11th, 2001 attacks on the World Trade Center.