Since the advent of the camera, there have been photographers whose mission is to record and interpret the public sphere in all its aspects. Eugene Atget documented evidence of everyday life in the streets as well as the buildings and monuments of Paris. Henri Cartier-Bresson pursued what he called "The Decisive Moment," the moment in which the meaning of an event was most clearly captured in a photograph. Their work, and that of many other masters, has inspired generations of photographers to wander public spaces, camera in hand, searching for meaningful moments in time.Success requires...