Researchers have developed a way that may identify masked terrorists through their hand gestures — more specifically, from the “V” signs they make when posing for photos or videos. A group of ...

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Roger Stone emerged from a federal courthouse in Florida on Friday, raised his arms wide and flashed two V-shaped hand signs to the mass of press and protesters assembled just for him. The longtime ...

The security system has to be robust enough to recognize slightly different speeds and shapes while still catching fraudulent attempts, researchers say. A new system can look at a person’s finger ...

Astute observers of recent pro-Morsi protests in Egypt will note a new symbol cropping up in photos of the protesting crowds: Demonstrators are now holding four fingers in the air. Many carry yellow ...