This clip is the first that I can remember to bring home to me how long ago the attack happened. Most people remember it through the conventions of TV news, which look and sound basically the same today as they did then, so the immediacy of it is preserved when the footage is re-run every year on 9/11. The quality of the police video is comparatively poor; it looks like another decade. And yet nothing is lost. If ever you’ve wondered whether this will get easier over time, here’s your answer. No.