In this photo taken Wednesday, July 18, 2012, U.S. Navy Airman Dylan Blank of Strike Fighter squadron VFA-146 prepares a fighter jet aboard the USS Nimitz aircraft carrier. The U.S. Navy is using its ... more 
In this photo taken Wednesday, July 18, 2012, U.S. Navy Airman Dylan Blank of Strike Fighter squadron VFA-146 prepares a fighter jet aboard the USS Nimitz aircraft carrier. The U.S. Navy is using its Rim of the Pacific exercises to test whether aircraft and sea vessels run the same using fuels made up of biofuel blends rather than traditional petroleum. (AP Photo/Oskar Garcia) less 
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Associated Press | Photo By Oskar Garcia
Thu, Jul 19, 2012 7:05 PM EDT