One in seven people in the US and in Britain think America was itself involved in staging the 9/11 terror attack that left around 3,000 people dead, according to a poll.
A survey, which interviewed 1,000 people in Britain and the same number in the US, found that 14 per cent of Britons and 15 percent of Americans think the US administration was involved in the tragedy, says the Daily Mail.
The polled people were asked: "It is generally accepted that these attacks were carried out by Al Qaeda. However some people have suggested there was a wider conspiracy that included the American government. Do you, yourself, believe that there was a wider conspiracy, or not?"
The belief that there was a conspiracy was more common among younger people, with 24 per cent of 16 to 24-year-olds believing the theory.
However, about two thirds of those polled - 68 per cent - said they did not think there was a conspiracy.
The survey was carried out for BBC documentary The Conspiracy Files - Ten Years On that studies why so many people believe there is a 'darker truth' behind the attack.
It was carried out by Gfk NOP in both the countries through telephone polls.