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Citizen journalism and the increase in user contribution and submission of amateur photos to news sites is becoming more widespread. As early as the Crimean War in the mid-19th century, photographers were using the novel technology of the box camera to record images of British soldiers in the field. However, the widespread use of cameras as a way of reporting news did not come until the advent of smaller, more portable cameras that used the enlargeable film negative to record images. The introduction of the 35 mm Leica camera in the 1930s made it possible for photographers to move with the action, taking shots of events as they were unfolding.