In the immediate aftermath of the 11 September Paul Virilio suffered from a malaise found very seldom among philosophers, which was caused by an excessive degree of confirmation on the part of reality. He broke off work on his book "L'accident Intégral" to put together an exhibition that was designed to illustrate the concept of the global accident in all its topicality. The outcome was the much-vaunted Ce qui arrive, which was housed in the Fondation Cartier pour l'art contemporain in Paris from 29 November 2002 to 30 March 2003. The cinematic installation, Unknown Quantity, which was a key part of the exhibition, features the staging of a discussion between Paul Virilio and Svetlana Alexiyevich, the author of the book "Chernobyl. Chronicle of the Future", the essential witness's statement on the conversion of history in catastrophe.