What about Al-Qaeda?
You might think Al-Qaeda is different. It is very powerful, organized, and out to get us, right? Consider this Los Angeles Times article, reviewing a BBC documentary entitled The Power of Nightmares, which shows that the threat from Al Qaeda has been vastly overblown (and see this article on who is behind the hype). And former National Security Adviser Zbigniew Brzezinski testified to the Senate that the war on terror is "a mythical historical narrative."
And did you know that the FBI had penetrated the cell which carried out the 1993 World Trade Center bombing, but had – at the last minute – cancelled the plan to have its FBI infiltrator substitute fake powder for real explosives, against the infiltrator's strong wishes (summary version is free; full version is pay-per-view)? See also this TV news report.