Photographing is essentially an act of non-intervention. Part of the horror...of contemporary photojournalism...comes from the awareness of how plausible it has become, in situations where the photographer has the choice between a photograph and a life, to choose the photograph.

The person who intervenes cannot record; the person who is recording cannot intervene.

Even if incompatible with intervention in a physical sense, using a camera is still a form of participation...the act of photographing is more than passive observing...it is a way of tacitly, often explicitly, encouraging whatever is going on to keep happening.

~ Susan Sontag, On Photography

~ Famous Photo of Vietnam War, used to propagandize the brutality of the Vietnamese, in fact an instance of personal vendetta against someone who had already killed the other man's family; interestingly, the blog where I found this also called journalism, 'churnalism'. Example of how photos can be used to angle a story the way the press (and those in power) wants it to be angled.