Of the remaining 198 inmates of the US military prison in Guantanamo Bay, nearly half are from Yemen, and it is their presence that most explains why President Barack Obama has found the prison more difficult to close than he envisaged. Many of those already released, and not just Yemenis, have turned up in Yemen's al-Qaeda camps, often after going through Prince Mohammed's rehabilitation courses. Fahd Saleh Suleiman al Jutayli, who was released from Guantanamo in 2006, was killed in northern Yemen in a shoot-out with government forces in September: his family were informed by another former Guantanamo inmate, Yusuf Mohammed al-Shehri, who had also returned to Yemen. Al-Shehri himself was killed by Saudi soldiers in a shoot-out at a checkpoint on the road from Yemen a couple of weeks later. He and a colleague were dressed as women. His brother, Said al-Shehri, may be the deputy leader of al-Qaeda in Yemen and it is possible that he was killed in an air raid two weeks ago.