How the BBC explains 9/11

Thanks to Tom Gross for pointing this out...this is from the BBC web site...

Why did they do it?

The way America has got involved in conflicts in regions like the Middle East has made some people very angry, including a group called al-Qaeda - who are widely thought to have been behind the attacks.

In the past, al-Qaeda leaders have declared a holy war - called a jihad - against the US. As part of this jihad, al-Qaeda members believe attacking US targets is something they should do.

When the attacks happened in 2001, there were a number of US troops in a country called Saudi Arabia, and the leader of al-Qaeda, Osama Bin Laden, said he wanted them to leave.