Deep inside the heart of the "Green Zone", the heavily fortified administrative compound in Baghdad, lies one of the most carefully guarded secrets of the war in Iraq. It is a cell from a small and anonymous British Army unit that goes by the deliberately meaningless name of the Joint Support Group (JSG), and it has proved to be one of the Coalition's most effective and deadly weapons in the fight against terror. Its members - servicemen and women of all ranks recruited from all three of the Armed Forces - are trained to turn hardened terrorists into coalition spies...