Surveillance vehicles take flight using alternative energy (w/Video)

Nearly undetectable from the ground, unmanned aerial vehicles (UAVs) are widely used by the military to scan terrain for possible threats and intelligence. Now, fuel cell powered UAVs are taking flight as an Office of Naval Research (ONR)-sponsored program to help tactical decision-makers gather critical information more efficiently... and more quietly.

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<p><a href="http://www.physorg.com/news159188609.html">Surveillance vehicles take flight using alternative energy (w/Video)</a></p> <p>Nearly undetectable from the ground, unmanned aerial vehicles (UAVs) are widely used by the military to scan terrain for possible threats and intelligence. Now, fuel cell powered UAVs are taking flight as an Office of Naval Research (ONR)-sponsored program to help tactical decision-makers gather critical information more efficiently... and more quietly.</p>