I'm not suggesting there was any kind of conspiracy behind 9/11. I'm suggesting the simple fact that there's a LOT of Republican interest in the MIC, and there always has been. 9/11 simply presented them with the opportunity to reverse many of Clinton's military cuts and bring back their favorite old pork barrel from the 40s to the late 80s/early 90s.
That's not to say Democrats are without fault, most of them voted for the USA PATRIOT Act, and authorized the Iraq War.
Both parties are all about power grabs and spending as much as possible on their own interests. The number of people in politics that remember our federal government is supposed to have limited power is frighteningly small.