In addition to the points already made in response to this, I'd like to add that CIA and FBI have had lots of chances to prevent 9/11 **within existing legislation** if they would have done their jobs properly and communicated slightly more.
It's always the same with every disaster: Important people (difficult to blame) don't do their work, a disaster happens, and as a result new measures are imposed that wouldn't have prevented the disaster either if carried out with the same negligence (and the old measures would have prevented it if carried out more effectively).
Slashdot Mirror
It's always the same with every disaster: Important people (difficult to blame) don't do their work, a disaster happens, and as a result new measures are imposed that wouldn't have prevented the disaster either if carried out with the same negligence (and the old measures would have prevented it if carried out more effectively).