If you want to learn what lies behind the "terrorist threat" watch the following documentary: The Power of Nightmares:
http://www.youtube.com/watch?v=ek7ZHenQnu4&feature=player_embedded
Watch The Power of Nightmares Episode 1 Online with Other Documentary Films and Free Movies at www.freedocumentaries.org.
"'The Power of Nightmares: The Rise of the Politics of Fear' consists of three one-hour films, mostly of a montage of archive footage.
The films compare the rise of the American Neo-Conservative movement and the radical Islamist movement, making comparisons on their origins and suggesting a strong connection between the two.
More controversially, it argues that the threat of radical Islamism as a massive, sinister organized force of destruction, specifically in the form of al-Qaeda, is in fact a myth perpetrated by politicians in many countries and particularly American Neo-Conservatives in an attempt to unite and inspire their people following the failure of earlier, more utopian ideologies."