Intelligence agencies have had some success in tracking suspected al-Qaeda operatives. But the organisation is changing to continue its fight against the West. The West has never encountered an enemy like al-Qaeda before. The problem for the world's intelligence agencies is that it is not a unified organisation with an identifiable structure, like the IRA, but an amalgam of groups around the world whose members embrace Osama bin Laden's ideology of global jihad, or holy war. These Jihadi warriors share the belief that they have an obligation to fight the oppressors of their Muslim brothers, from Palestinians in the Middle...