Charlie Sheen has called on Barack Obama to give substance to the conspiracy theories around the attacks on 9/11.
The Wall Street actor believes that the US President should answer a "bottomless warren of unanswered questions surrounding that day and its aftermath".
In an open letter to Obama, he has called for a new investigation into the attacks on the World Trade Center and Pentagon in 2001.
He and his fellow conspiracy theorists believe that the "Bush/Cheney" regime were behind the attack in a bid to invade Iraq.
He also claimed that "9/11 has been the pretext for the systematic dismantling of our constitution and Bill of Rights".