9/11 anti-conspiracy videos/sites?

[blix]

My mum has been watching stuff on some loony conspiracy site recently and has been taken in by it all. She believes it was all done by the secret government so they could go on a crusade for oil etc. :/

Does anyone know any videos or sites that go through stuff like Loose Change (which she thinks is a 'masterpiece') bit by bit and argue against it?

Thanks.