Alex Jones: 'The official story doesn’t add up'
Ten years after the attacks on the 11 September which killed nearly 3,000 people in New York, Washington and Pennsylvania some still question the official account of what happened on 9/11.
Based in Austin, Texas, radio talk show host Alex Jones is one of the loudest voices in the self-styled 9/11 Truth movement.
He believes there are many unanswered questions about the 9/11.
The Conspiracy Files: 9/11 - Ten Years On will be broadcast on Monday 29 August 2011 at 2100 BST on BBC Two.