Cell phone jammers raise question: who controls the airwaves?

As more people go about chatting obliviously on their cell phones in public places, foreign companies have enjoyed increasing US sales of a new, albeit illegal, device: the cell phone jammer. When you turn it on and slip it in your pocket, the cell phone jammer blocks cell signals within 30 feet.

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<p><a href="http://www.physorg.com/news113839758.html">Cell phone jammers raise question: who controls the airwaves?</a></p> <p>As more people go about chatting obliviously on their cell phones in public places, foreign companies have enjoyed increasing US sales of a new, albeit illegal, device: the cell phone jammer. When you turn it on and slip it in your pocket, the cell phone jammer blocks cell signals within 30 feet.</p>