The US and UK governments are developing increasingly sophisticated gadgets to keep individuals under their surveillance. When it comes to technology, the US is determined to stay ahead of the game.
How you walk could be used to identify you in a crowd
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"As you walk through a crowd, we'll be able to track you," said Professor Challapa. "These are all things that don't need the cooperation of the individual."
"Yeah, I know," he said. "It sounds very Star Trekkish, but that's what's ahead."
"But it will also show whether someone inside a house is looking to harm you, because if they are, their heart rate will be raised. And 10 years from now, the technology will be much smarter. We'll scan a person with one of these things and tell what they're actually thinking."
"I hope in the future we'll be able to have conversations, if say you're speaking in French and I'm speaking in English, and it will be natural."
clipped from: news.bbc.co.uk