Robert Gates announced that invading Iraq would not solve the terrorist problem.
Now, anyone who thought this through five years ago could have said this, particularly in the face of evidence showing no connection between 9-11 and Iraq, as conceded by the President, but then again, we invaded because Iraq had nuclear weapons they didn't have. But that's not what Gates was referring to.
No, instead, he meant that Turkey sending troops into Northern Iraq would not fix the terrorist problem. Our invasion went off without a hitch, so the terrorist problem is never going to be an issue again.