USNS Henry J. Kaiser (T-AO 187), 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. In the background are the aircraft carrier USS Nimitz (CVN 68) and the guided-missile destroyer USS Chung-Hoon (DDG 93).