I saw a documentary, might have been called 'In Plane Sight' and one of the things I remember was about the plane that crashed into the Pentagon.
News footage and photos clearly show a relatively small round hole in the side of the building immediately following the crash, ie not passenger plane sized or shaped.
In the footage there were no signs of wings or tail sections amongst the wreckage.
There should have been a massive fireball but there wasn't.
In the rubble was found part of a jet engine, a jet engine that would not be found on the plane that supposedly crashed.
The petrol station opposite had it's cctv footage immediately confiscated. It took months for them to release anything and then it was only a few frames that proved nothing.
There was also something about the lamp posts outside, but I can't quite remember what was wrong with them.
There were loads and loads of odd things that just don't add up if you believe the official story.