Two of the leaders claiming to be behind the Northwest Airlines attempted attack had been housed at Guantanamo Bay. They were released in November, 2007.
The prisoners #333 and #372 were sent to Saudi Arabia where they were put into an art therapy treatment program before being released.
Muhamad Attik al-Harbi and Said Ali Shari left Gitmo for Saudi Arabia on November 9, 2007.
Since their return both of the released men have become leaders in Yemen's al Qaeda groups.
In Feburary 2009 Muhamad Attik al-Harbi turned himself into authorities in Saudi Arabia. He was returned to a rehabilitation centre.