City of cameras

12:00 AM ET Wed, 4 Sept 2013

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.