What's that saying -- Absence of evidence is not evidence of absence.
It took 6 years to plan and execute 9/11. Even if they began planning another attack immediately after 9/11 and have gone so far undetected, it could be years before anything happens and we truly know if the current anti-terrorism measures have been "successful" (and likewise, "unsuccessful").
Using your logic almost every President from George Washington to Bush Sr did a "great job" in regards to anti-terrorism. If there wasn't an attack, they must have done something right!
Yes, where is the parade of terrorists convicted in the last 5 years? The shoe bomber? HAHAHAHA.
2000 Contour SE Sport
Originator of the Beowulf Headlight Mod and the Beowulf CAI