Oklahoma Gov. Mary Fallin addresses a group on natural gas vehicles in Oklahoma City, Wednesday, Aug. 8, 2012. Officials with automobile manufacturers, converters and dealers are meeting in Oklahoma ... more 
Oklahoma Gov. Mary Fallin addresses a group on natural gas vehicles in Oklahoma City, Wednesday, Aug. 8, 2012. Officials with automobile manufacturers, converters and dealers are meeting in Oklahoma City to discuss a request for proposal from nearly two dozen states for the nation's auto makers to produce natural gas-powered vehicles for state fleets. (AP Photo/Sue Ogrocki) less 
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Associated Press | Photo By Sue Ogrocki
Thu, Aug 9, 2012 12:14 PM EDT