Some cities have video surveillance of public spaces. Well, Chicago has gone one better by pairing ordinary video surveillance with new high technology that will detect gunshots, determine where it came from, take a video of the shooter and call 911. It's called SENTRI. What will they think of next? Check out the photo and more info at: Metroblogging Chicago: Smart Sensor Enabled Neural Threat Recogniton and Identification System. Because "Big Brother" was already taken.