The horror began Friday morning in New Zealand, as the alleged shooter used Facebook to live-stream his assault on Al Noor Mosque, one of two Christchurch mosques that he attacked and the scene of most of the 49 fatalities. Many hours later - long after the man and other suspects had been arrested - some internet users still were uploading and re-uploading the video to YouTube and other online services. A search of keywords related to the event, such as "New Zealand," surfaced a long list of videos, many of which were lengthy and uncensored views of the massacre.