There are dangerous and fanatical individuals and groups around the world who have been inspired by extreme Islamist ideas, and who will use the techniques of mass terror - the attacks on America and Madrid make this only too clear. But the nightmare vision of a uniquely powerful hidden organisation waiting to strike our societies is an illusion. Wherever one looks for this al-Qaeda organisation, from the mountains of Afghanistan to the "sleeper cells" in America, the British and Americans are chasing a phantom enemy. But the reason that no-one questions the illusion is because this nightmare enemy gives so many groups new power and influence in a cynical age - and not just politicians. Those with the darkest imaginations have now become the most powerful. In part one, the programme looked at the origins of the neo-conservatives and the radical Islamists in the 1950s. The second part of the series examined how the radical Islamists and neo-conservatives came together to defeat the Soviet Union in Afghanistan.