Seriously, when you get an hour watch the BBC link I posted. It's exactly that, and takes five people who are 'truth movement' types to America to try and prove it wasn't a conspiracy.
They meet structural engineers who know exactly why the buildings fell down vertically, meet people who explain the Pentagon thing etc etc. They even had one 'non-believer' actually land a light aircraft after 30 mins training to prove the hijackers were able to carry out their plan in the first place.
I have to say I was sceptical, but the more I watch the less I believe anything untoward happened (other than a terrorist attack of course).