Police surveillance tools of the future were displayed at a conference in Dubai, The New York Times reports. Such technology included a brain scanner purporting to detect lies, miniature video cameras that could be lodged inside a vape pen and cameras that can scan faces and license plates from a kilometer away. Many tools rely on advanced artificial intelligence, drones and facial recognition tech. The United Arab Emirates has become a "petri dish" for testing new police surveillance, such as the UAE employing a predictive policing tech that guesses thieves' next targets with 68% accuracy.