
The date 21 April 2011 has been prophesied in the Terminator series as Judgement Day, when the machines rise up and bring about the end of human society as we know it.
Artificial intelligence clearly has not developed in quite the way James Cameron's science-fiction franchise predicted, but how close are we to the technologies he depicted?
Central to the Terminator series is the idea of Skynet, the United States's "Global Digital Defense Network", which develops self-awareness and begins a nuclear war.
Western military forces have long relied on networks to distribute information, such as the US Department of Defense's system for sharing top-secret information - the Joint Worldwide Intelligence Communications System.
http://www.bbc.co.uk/news/technology-13159616