On September 11 more people clicked "on documentary news photographs than on pornography for the first (and only) time in the history of the Internet," reports writer David Levi Strauss. The archive of images associated with the tragic events of 9/11 merits careful analysis. Artist Damien Hirst has suggested that the attacks were designed to be viewed - "The thing about 9/11 is that it's kind of an artwork in its own right. It was wicked, but it was...