In a small windowless cell lit by a single light bulb, Louai al-Sakka sits isolated from the world and fellow inmates for 24 hours a day. His concrete box is in the bowels of Kandira, a high-security F-type prison 60 miles east of Istanbul, which was built to house Turkey's most dangerous criminals. The prison has been criticised by human right groups such as Amnesty International. The guards control everything, including the cell's light switch. Sakka's only visitor is Osman Karahan, a lawyer who shares his fervent support for militant Islamic jihad. Since being convicted as an Al-Qaeda bomb plotter...