Secondly, Osama Bin Laden was trained by the CIA itself, not to mention the fact that he has never been found to this day. Now how can one keep himself hidden from the country that is looking for him forever? It is futile to dig out the truth. One can only make guesses. However, the fact remains that there is a huge possibility that the government is the one hiding him.
Thirdly, if we take a closer look at the 9/11 incident, the entire WTC crashed to the ground within what? A few hours? A few minutes maybe? Hour or minute, the fact remains that the World Trade Center was made out of strong steel. It would take weeks to burn metal without any other substance to assist the fire in doing so. No. The building was probably rigged with explosives in vital locations of the building, allowing it to go down just like that should a plane rigged with oil crash into it.
If you would like to argue against this, then go ahead. But do so in a civilized way.