This undated photo provided by Lockheed Martin shows Lockheed engineer Dave LeVan standing next to a MagneLink underground mining communication system. LeVan developed the technology that uses ... more 
This undated photo provided by Lockheed Martin shows Lockheed engineer Dave LeVan standing next to a MagneLink underground mining communication system. LeVan developed the technology that uses magnetic waves to send signals to the surface in the event of a mining disaster. (AP Photo/Lockheed Martin) less 
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Associated Press | Photo By Lockheed Martin
Wed, Jul 20, 2011 7:57 PM EDT