"Indeed, no event that takes place in the world can be so inconsequential as to escape the scrutiny of the camera lens, whether it is in politics, the economy, the arts and humanities, scientific research and technological advance, or environmental protection and conservation.
It is true: a picture is worth more than a thousand words. And photojournalists are out there precisely to remind us, on a daily basis, that where words are simply inadequate to describe what is happening around us, the click of the camera shutter can often work wonders to bring the rest of the world what would otherwise go unnoticed. "
Skip the fodder at the beginning and get to the meat, it's worth the read.