No one gets fucked up from beer.
Fuck today.
Various elements of the Bush Administration/CIA/Pentagon (+ others?) planned/assisted the events (utilizing their "mujahideen" database for scapegoats), and then covered it up and seized the opportunity to expand the war/spook departments, create extreme domestic controls, and destabilize the geopolitical landscape in the middle east in the West's favor.
I think the desire some people have for a conspiracy theory is honestly the important and more intriguing aspect of 9/11 than whether or not there was any conspiracy. Regardless of the fact that any solid proof of a conspiracy is never likely to come to light (any confession from an individual, or even group of individuals, will inevitably draw the criticism of wanting attention), the seed has been planted and everyone knows about the 9/11 conspiracy theories, whether they believe them or not. In a sense, it doesn't matter, because all these possibilities are present in the psyche of post-9/11 America.
The 9/11 conspiracy theory(ies) represents a knot in history that people want to see unraveled, convinced of something at its center, when in truth the phenomenon itself, its portrayal in the media, its interpretation by those beyond it, and its impact on culture and politics in the post-9/11 world are far more interesting than whether or not there ever was any conspiracy.
Noam Chomsky and Slavoj Zizek (along with several others; another interesting cultural theoriest who looks at homeland security after 9/11 is Harvey Molotch from NYU) have made it clear that, in the wake of 9/11, the government has taken advantage of a new fracture or trauma at the heart of the American people and the world. We're in a new age of politics and security, that's for certain; but it doesn't matter whether or not the government devised any conspiracy theory to concoct a scenario in which they could manipulate the patriotism and fear of its citizens. They're doing that, regardless of any conspiracy.
The revelation of a conspiracy wouldn't actually point us to anything new. Obviously our government will go to extensive and questionable means to control its citizenry, but we don't need proof of a conspiracy theory to show us that. Their actions in the wake of 9/11 tell us all we need to know.
Just out of curiosity, what is the supposed motive of the conspirators? People have "surrendered liberty," yes, but who benefits from that? That new power must serve some end. The only people who have really benefited are the contractors and PMCs working in Iraq and Afghanistan. Obviously they have some ties to the government officials who would presumably have been involved in the supposed conspiracy (and I have no trouble believing Dick Cheney would do that shit). But I can't see how manufacturing a terrorist attack and attributing it to Al Qaida is the best way to start a war in Iraq. The plutonium bullshit would probably have been enough. As for Afghanistan, I'm sure they could have found a better pretext.
Even if they felt an attack was necessary, there was no need for such a dramatic one. The logistics involved in staging such a massive fraud...from what you said I take it you don't believe the planes that hit the tower were the same planes, in which case the real planes must have been landed at a secret airstrip, the passengers killed, and the bodies and planes disposed of. Or actually I guess it'd be simplest to crash them in the ocean and have the hijackers parachute out and be picked up by boats. Either way you have a substantial crew of operatives who are in on the conspiracy. You also need some actual suicide pilots to crash the fake planes. Plus some people to set up the explosives to actually bring the towers down. And then people to cover it up. That's a fairly large number of people, all of whom are acting for the express purpose of murdering several thousand of their countrymen, many of whom would need fairly sophisticated training. Perhaps you could find a sufficiently ruthless PMC to do that...it's possible. But the suicide pilots? Whoever flew the planes that hit the towers (unless the planes were just holograms using advanced technology the government's been hiding in area 51) died. In the case of a conspiracy, that means that they found at least 2 people (probably more) willing to commit a suicide attack. Again, maybe possible but this is sounding like a huge production, and one that would be nearly impossible to cover up. If the only goal was to start wars in the Middle East, wouldn't it have been easier to fake an assassination attempt on the president or something? That would have been relatively easy. Maybe someone fires an RPG at Air Force One, and then the marines produce the bodies of some terroristy types.