Al-Hawsawi, 43, of Saudi origin, is accused of serving as a paymaster and facilitator for the Sept. 11 operation from his post in Dubai, United Arab Emirates, providing money and travelers checks, air tickets, Western clothing and credit cards to four of the 9/11 hijackers (and to a fifth man who was ultimately denied entry to the United States).
He shared with one hijacker a United Arab Emirates-based financial account that funded the hijackers' activities in the month before the attacks. Al-Hawsawi also worked in the al Qaeda media center in Afghanistan from 2000 until he departed for the United Arab Emirates in early 2001.
He was captured in Pakistan in 2003 and held at Guantanamo, but the following year was transferred to a CIA "black prison." He was returned in Guantanamo in 2006.
In his testimony read at the 2006 trial of Zacarias Moussaoui (a convicted 9/11 conspirator), al-Hawsawi said he had seen Moussaoui at an al Qaeda guesthouse in Kandahar, Afghanistan, in the first half of 2001.