Juliette Binoche joins the list of crackpots who think they have been let in on the truth about 911:

A Few Days in September is witty and clever, but there is a serious point behind it - with which Binoche is more than a little obsessed. She describes it as a dramatised version of the events depicted in Michael Moore’s documentary Fahrenheit 9/11. It alleges that various vested interests - including state security services around the world - knew what was about to happen on September 11, 2001.

While preparing for the role Binoche had long conversations with a secret agent, who consulted on the film and on whom she modelled her character. ‘Of course he could not reveal everything to me, but he said a lot,’ she says. ‘Some things I forgot because it was just too much. Certain things I was very amazed by and when I told people close to me about them they just wouldn’t believe it. Everything in there is true,’ she adds, her eyes blazing with the fervour of a conspiracy theorist.

So is she saying the film is a dramatisation of real events? ‘Absolutely,’ she says. ‘I went to see the Iranian ambassador at the time and he said of course it’s true. Things that I thought were hidden and private… they were very open about it.’ So she means the CIA and other agencies knew 9/11 was going to happen? ‘Of course.’ So is she saying it was an inside job? Or that al-Qa’eda was responsible? ‘Everybody is responsible for it. If you only knew more, it’s even more depressing.’ She suddenly realises this is all getting a bit implausible and explodes into laughter. ‘Humour is the only way we can deal with it.’