There can be no evidence, photographic or otherwise, of an event until the event itself has been named and characterized. And it is never photographic evidence which can construct—more properly, identify—events; the contribution of photography always follows the naming of the event. What determines the possibility of being affected morally by photographs is the existence of a relevant political consciousness. Without a politics, photographs of the slaughter-bench of history will most likely be experienced as, simply, unreal or as a demoralizing emotional blow. (Susan Sontag, On Photography)