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City of cameras

Wednesday, 4 Sep 2013 | 12:00 AM ET

Rio de Janiero may be known for its beautiful beaches, but it also has to grapple with high crime, large-scale protests, and the threat of landslides. Now, officials have put in place a cutting edge network of thousands of cameras and sensors that monitor the city around the clock in an effort to ease traffic, thwart crime, avoid catastrophe, and save lives.