In a July 18, 2012 photo provided by the U.S. Navy, the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187), left, delivers a 50-50 blend of advanced biofuels and traditional petroleum-based fuel to the guided-missile cruiser USS Princeton (CG 59) during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012 exercise. Navy Secretary Ray Mabus says he thinks federal lawmakers will come around on the branch’s ambitions to ease its use of foreign oil once they understand it’s not an environmental move _ it’s a defense strategy. In the background are the aircraft carrier USS Nimitz (CVN 68) and the guided-missile destroyer USS Chung-Hoon. (AP Photo/U.S. Navy, MC3 Ryan Mayes)

Associated Press
In a July 18, 2012 photo provided by the U.S. Navy, the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187), left, delivers a 50-50 blend of advanced biofuels and traditional petroleum-based fuel to the guided-missile cruiser USS Princeton (CG 59) during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012 exercise. Navy Secretary Ray Mabus says he thinks federal lawmakers will come around on the branch’s ambitions to ease its use of foreign oil once they understand it’s not an environmental move _ it’s a defense strategy.  In the background are the aircraft carrier USS Nimitz (CVN 68) and the guided-missile destroyer USS Chung-Hoon. (AP Photo/U.S. Navy, MC3 Ryan Mayes)
In a July 18, 2012 photo provided by the U.S. Navy, the Military Sealift Command fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187), left, delivers a 50-50 blend of advanced biofuels and traditional petroleum-based fuel to the guided-missile cruiser USS Princeton (CG 59) during the Great Green Fleet demonstration portion of Rim of the Pacific (RIMPAC) 2012 exercise. Navy Secretary Ray Mabus says he thinks federal lawmakers will come around on the branch’s ambitions to ease its use of foreign oil once they understand it’s not an environmental move _ it’s a defense strategy. In the background are the aircraft carrier USS Nimitz (CVN 68) and the guided-missile destroyer USS Chung-Hoon. (AP Photo/U.S. Navy, MC3 Ryan Mayes)
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