160120-N-LV331-004 PACIFIC OCEAN (Jan. 20, 2016) Secretary of the Navy (SECNAV) Ray Mabus, center right, and Secretary of Agriculture Tom Vilsack, center left, tour the guided-missile destroyer USS William P. Lawrence (DDG 110). Mabus and Vilsack flew out to William P. Lawrence (DDG 110) to witness it replenishing its tanks with alternative fuel from the fleet replenishment oiler USNS Guadalupe (T-AO 200) as part of the Department of the Navy�s Great Green Fleet initiative that demonstrates the sea service�s efforts to transform its energy use. (U.S. Navy photo by Mass Communication Specialist 2nd Class Armando Gonzales/Released)