In the current conflict in Iraq and Afghanistan, Britain's Special Forces are on the front line. These heroes are so respected that they are even called upon by the Americans when a particularly difficult and dangerous job has to be done. Time after time they have proved their worth on the battlefield, confirming that their commitment and professionalism are second to none. Military expert Nigel Cawthorne looks at the crucial role that the British special forces have played since the 9/11 attacks on the World Trade Centre and the Pentagon. Of course, the circumstances have changed dramatically since the 'War on Terror' began, which has made the task facing these brave soldiers even more complicated than it originally appeared.