Brief Overview:
1/ TerrorIsts somehow knew how to switch off the planes IFF (Identify Friend or Foe) transponders which sends out a radio signal to ground radar that plots exactly where they are during flight...
2/The attack on the Pentagon was not done by an aeroplane, many people said they saw a missile go through it (probably a cruise)...Security video tapes were removed by FBI agents agents from a gas station close to the Pentagon immediately after the attack.
3/Pictures of the hole where the plane had supposed to have crashed through the side of the Pentagon showed a photo of a plane engine at the side of the hole which was identified as a Rolls Royce engine, that Rolls Royce EMPHATICALLY DENIED the following day!!
4/The fourth plane was supposed to have crashed in a field in Pennsylvania 20 minutes after the attack on the WTO...Fox News sent down one of their News Agents to that field where she was shown on the newsreel looking bemused at a small hole with NO plane wreckage or bodies around it..
5/President Bush allegedly told troops and the US Airforce to "stand down" before the attacks took place...He later went on TV explaining where he was at the time of the first attack, which was soon proved he was NOT at that location!! There is lots more evidence out there to prove the attacks were NOT done by terrorists, but many people in denial could never believe that the US Government was the perpetrator in all of them all them..