The widespread diffusion of nuclear weapons would make many nations able, and in some cases also create the pressure, to aggravate an on-going crisis, or even touch off a war between two other powers for purposes of their own. ↗
With today's fast films, you can light the way your eye sees the scene. You can abuse the film and create subtleties in contrast with light and exposure, diffusion and filters. That's what makes it an art. ↗