Thomas Hoepker's 9/11 picture for instance, despite his hesitation in publishing it, probably raises the most questions about that day than any of the thousands of 'impulse pictures'. That's important. It probably still would be if he'd left it another 10 years. Some images absolutely need to be shown during or in the immediate aftermath of events and arguably, video is best suited to this (camera manufacturers understand this, even if we don't yet) but some pictures only truly have an impact in retrospect. The need to be retrospective, in fact, is almost ingrained in the traditional process and I hope this always has value to people.