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No hiding place

4 October 1997

Along with handcuffs and a truncheon, bobbies on the beat may soon carry a
radar flashlight. A prototype device has been built by researchers at the
Georgia Tech Research Institute in Atlanta. The radar flashlight uses a signal
processing chip to detect a human through walls and doors. It can penetrate a
20-centimetre block wall to reveal movement as subtle as breathing.

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