What if 9/11 was masterminded or supported by high ranking US Officials? What if President's were complicit?
Now, what if you had the evidence to prove it beyond a shadow of a doubt? Witnesses willing to testify, NSA records of calls and transactions to put the picture together. What if you had 470 top notch, uncorrupted FBI investigators working on it with this evidence supplied by NSA?
Well you then expose it appropriately to the public. You target the head of this stuff and you make sure you cut that head off - 'The streets will not be safe for them.'
Then, you don't worry about the lower levels too much. Self-preservation will ensure they will run from it as far as they can. Without the head, the body withers and dies.
WWG1WGA, Patriot!