"We the people are the rightful masters of both Congress & the courts, not to overthrow the Constitution, but overthrow the men who pervert the Constitution."
- Abraham Lincoln
To use your 'logic' we should keep a wary eye on Japan, they did Pearl Harbor after all...
9-11 did not occur because al-Queera was all powerful, we were that lazy and had a colossus failure our intelligence organizations. al-Queera tried this same thing in France but failed because the hijackers didn't control the aircraft, the aircraft was low on fuel, had to land before continuing on to Paris.
They learned from that mistake, we didn't pay attention.
Local FBI reports odd training requests by Arab men for commercial jet aircraft flight instruction and no one checks that out.
Passengers sat by as the hijackers took over the cockpit.... THAT ain't gonna happen again!
Our intelligence agencies were not thinking, after generations of making careers on facing the E-Vile Empire the CIA, FBI, NSA were not flexible enough to face a new threat.
Look how long spies, for Israel and Roosia worked in the FBI, Navy, State Dept...
We don't need the Patriot Act, we need intelligence agencies that care more about watching out for threats than watching for promotions and retirement packages.
A better question for the you to ask is what new threat is emerging that no one is looking into. al-Queera is so yesterday's threat.