In advance of the 2016 Olympics (and the thousands of visitors it'll draw), military police in Sao Paolo and Rio de Janeiro are testing glasses topped with cameras capable of scanning crowds for criminals. The camera analyzes 46,000 biometric points on up to 400 faces per second -- data that then gets compared with a database of 13 million people. If a mug happens to match a wanted person or known troublemaker, a red light will appear on a small screen connected to the glasses. And, in a twist particularly befitting Robocop, the glasses can be calibrated to zoom in from 12 miles away, though they'll typically be used to manage crowds at a much more personal 50 meters (164 feet). For now, local cops will use them to tame crowds
