I am going to start this post with a quote from Adolf Hitler.
"Terrorism is the best political weapon for nothing drives people harder than a fear of sudden death."
He used false terrorism in order to restore patriotism in the German people and secure his power. The US Government did a similar thing with the 9/11 attacks.
The Pentagon
It is claimed that an airliner crashed into The Pentagon and penetrated it. This claim is completely false. In the photos shown of what is 'supposed' to be the airliner there is no debris that is recognizable as an airliner. It is suggested that a missile was fired at The Pentagon, and this is the theory which I believe.
If you Google photos of the 'crash site' you can't see any wings, tail, fuselage or anything that you would expect if a plane had just ploughed through a building. Also the damage is limited to only a small area, if a passenger aircraft was going in excess of 500MPH and hit glass and concrete then it would have done exponentially more damage due to the sudden deceleration. The US government fired a cruise missile at it's own building, and if you were a terrorist, wouldn't you hit the White House and take out the man in charge?
World Trade Centre
We all know that 2 planes plowed into both towers. But was it enough to bring them down?
Contrary to belief, the floors of the World Trade Centre were not designed to 'pancake'. They were also fitted with viscoelastic dampers which would help keep the towers steady in the strongest of winds. The force of the planes hitting each tower would have been less energy than that of a very strong wind, but more concentrated. This would have made the structure unstable and possibly weakend it from the floor of impact up. The lower floors would still be stable. So why did it come down?
Explosives were used to bring down both the towers and the buildings around the world trade centre. This was because the US government thought that killing 2500 civilians and blaming it on Al-Qeuda so they could go on the hunt for oil.
Weapons of Mass Destruction
Everyone knows that the war in Iraq was started in order to find WMD's that Saddam Hussein was apparently stockpiling. As expected, jack all was found except lots of oil! If you had nuclear weapons and you wanted to start a war, why not launch a nuclear weapon to the heart of the most populated city in the US to show that you meant business? Oh wait, that's right, you don't have any and you didn't start the war! The US only invaded Iraq to secure oil and bring down Saddam as they saw him as a threat to their regime in the fact that he knew the truth!