Bush claims he needs NSA wire tapping to break up terrorist networks but terrorists are not using the phone network Bush is tapping. They are using private voice over IP internet phones (VoIP) that can't be tapped. This video explains how it works.
Google Video introduction
A very sound presentation, in this writer's opinion. Demonstrates how phone tapping just like so many other extensive measures the Bush Administration implements, ostensibly in the "war on terror", seem to be far better suited to controlling and manipulating law-abiding citizenry than to aprehending potential terrorists - especially if those terrorists are at all technically and intellectually savvy.