The decisive moment, the popular Henri Cartier-Bresson approach to photography in which a scene is stopped and depicted at a certain point of high visual drama, is now possible to achieve at any time. One's photographs, years later, may be retroactively rephotographed by repositioning the photographer or the subject of the photograph, or by adding elements that were never there before but now are made to exist concurrently in a newly elastic sense of space and time.

In fact, the new malleability of the image may eventually lead to a profound undermining of photography's status as an inherently truthful pictorial form... If even a minimal confidence in photography does not survive, it is questionable whether many pictures will have meaning anymore, not only as symbols but as evidence.

Photojournalism has become a hybrid enterprise of amateurs and professionals, along with surveillance cameras, Google Street Views, and other sources. What is underrepresented are those "metaphotographers" who can make sense of the billions of images being made and can provide context and authenticate them. We need curators to filter this overabundance more than we need new legions of photographers.

I always believed that photography was subjective, interpretive and certainly did not represent the truth, but I did think that its status as a societal and historical referent needed to be both safeguarded and illuminated....now photojournalism is devolving into yet another medium perceived as intending to shock, titillate, sell, distort.

The decisive moment, the popular Henri Cartier-Bresson approach to photography in which a scene is stopped and depicted at a certain point of high visual drama, is now possible to achieve at any time. One's photographs, years later, may be retroactively rephotographed by repositioning the photographer or the subject of the photograph, or by adding elements that were never there before but now are made to exist concurrently in a newly elastic sense of space and time.

We have a long history of snapshot photography that appeared to many to be more arbitrary and idiosyncratic than much of the work of professionals. We valued it for what it could tell us about the details of people's daily lives.

The slideshow "is a very primitive form that quickly becomes predictable and repetitive."