So,it's 9 1/2 years after their supposed convoluted plan to kill thousands and blame it on 19 Islamic extremists.

what has been the benefit to the supposed conspirators?
Outside of a Gazillion dollars pissed away and thousands more lives been lost, little is heard from Bush/Cheney. They didn't set themseleves up as some ongoing Junta. Please remember in this discussion that I was not, and will never be a Bush supporter. I an quite happy that Obama won the election.
That doesn't change the facts that statements dear to the 911 deniers have been have been cherry-picked out of context, and that scientific facts about how building behave when exposed to thousands of degrees of heat for an extended period act are ignored.
Lizzie do you really believe that steel doesn't soften and melt at 2,000 degreesF? If so, you should look at any photo of steel being worked in a mill. It is worked when hot specifically BECUASE it is softer. Do you think that soft metal is as strong as solid?
The designers of the WTC were not surprized in the least that the framework softened and collapsed and that the upper floors destroyed the weakened sections and everything under them. Neither was Bin Laden. He counted on it. He was trying to improve on his earlier attempt.
Do you believe that literally hundreds of tons... TONS of plastic explosives can be planted in public buildings occupied continuously without members of the public being aware of it?

This very discussion is very small example of the continuation of free speech in the US. I think the anti-Bush 911 deniers are as delusional as those who think that Obama isn't a US citizen and is secretly plotting to turn the US into an Islamic nation; but no jack-booted attack squads are bursting through the doors of LittleHawk, or Lizzie because they have spilled the secret beans.
There is a view that THE GOVERNMENT is a megalithic block of demons who want nothing more than to turn us all into mindless slaves is a convenient mythos.
Many of us in the DC area personally know members of the security agencies of the government who would not support or allow such actions to go unopposed. It would not be possible to manage thousands of co-conspirators, the security forces needed to oversee them for the rest of their lives, the forces needed to oversee the overseers, to control the news media, the people who would have been forced to lie that they saw a plane hitting the Pentagon.
The bottom line of the lawsuit is that a plane never hit the building (the basic design of which was selected by General Groves because of tests that showed it to be a superior shape in resistance to explosive blast waves)So everyone who says they saw diffently must therefore be lying and be part of the plot.
Aircraft are much more fragile that most people think. There is an old saw that goes "Why don't they just make airplanes out of the stuff that they make those black boxes out of". The reason is that the plane would be so heavy that wings could not support it. A 757 at maximum TO weight is 255,000 could you imagine how much it would weigh if made of much denser material? Passenger flight would be entirely impractical. Aircraft design has always been a delicate balance between making the craft light enough for the wings to lift, while being strong enough to resist the natural forces of flight trying to rip it apart.
Aluminum will melt and burn away at temperatures well below the burning point of aviation fuels. There are photos that clearly show the remains of the most substantial sections of the Pentagon plane...the destroyed remains of the engines engines, buried deeply in the building. Pictures taken right scant minutes after impact show debris outside the building as well. Who would have put that debris there, in full view of commuters on I-395 and the George Washington Parkway in the moments after the explosion?
If you throw a soda can hard enough at a stone wall it will burst. Now imagine the wall is the thick side of the Pentagon, and that the soda can is travelling at more than 300 MPH,is full of air, aviation fuel, two ignition sources, and a bunch of innocent passengers.
Workers at the Pentagon who were horribly burned by the explosion have repeatedly tesified that the impact was from outside, and that they smelled aviation fuels as they tried to rescue themselves and their coworkers.
Could you imagine what could possibly make people lie about it after they watched the offices they had been working in explode around them, whose faces and bodies have been destroyed by third degree burns, whose coworkers died before their eyes, who tried to drag the smoldering and smashed bodies out, who saw the body parts, who have to live with not being able to rescue the screaming friends on the other side of walls of fire?
Money? Fame? A big recording contract? Yeah, that just might work.

This lie does an outragious disservice to the heroes of that terrible day.