How does photojournalism differ from journalism?

Photojournalism is defined as: Journalism in which a news story is presented primarily through photographs with supplementary written copy. (From the American Heritage® Dictionary of the English Language, Fourth Edition 2006.) "Supplementary written copy" may be as simple as photo captions in what is called a photo essay, in which a series of photographs are made of a single subject, for example, homelessness.

Photojournalism is important because of the principle of one picture being worth a thousand Words. This is not necessarily always true, but humans are visual beings. Often it's far easier, and has far more impact, to show a photograph than try to describe what's happening in a news story. An example is a woman crying over a flag draped casket. She is touching her forehead to the coffin and the pain on her face is palpable. The picture needs no caption to tell the story. You see it and are moved, whether the woman is wife, mother or sister. A loved one has fallen in battle and she is aggrieved. You not only see it, you are also affected by it.

And, it has just taken me 183 Words to describe what photojournalism is and why it is important.