The film showing the assasination of John Kennedy 40 years ago is only 26 seconds long – 494 tiny frames. But its impact on American culture was huge. “The Zapruder film has wormed itself so deeply into the culture that many of the pathways it opened are no longer visible. Still, enough traces of its legacy can be seen — from rampant paranoia about government and disgust with the news media to a loss of faith in photographic truth and the acceptance of graphic violence as part of the movie experience — that recognition of its legacy is in order 40 years later.”