Artificial intelligence is now an arms race. What if the bad guys win?

Unless you've had your head in the sand over the past few years, you'll have heard about the unprecedented -- and largely unexpected -- advancement in Artificial Intelligence (AI). Perhaps the most public example of this was when Google's company DeepMind used an AI called AlphaGo to beat one of the world's top Go players in 2016. Today, it plays a role in voice recognition software -- Siri, Alexa, Cortana and Google Assistant. It's helping retailers predict what we want to buy. It's even organising our email accounts by sorting the messages we want to see from those we don't.