NAVAL AIR STATION NORTH ISLAND, Calif. -- The Honorable Secretary of the Navy Ray Mabus hosts a signing ceremony with the Western Area Power Administration and Sempra U.S. Gas & Power at Naval Base Coronado, Aug. 20. The ceremony marked the signing of the largest renewable energy purchase by a federal entity. Patti Wagner, chief executive officer, Sempra U.S. Gas & Power, and Ron Moulton, senior vice president, Western Area Power, acted as representatives of their respective entities.Distinguished guests were invited to sign a solar panel in honor of the agreement. Brig. Gen. Edward D. Banta, Commanding General, Marine Corps Installations West Marine Corps Base Camp Pendleton, added his signature to the panel.(Photo by Cpl. Asia J. Sorenson/Released) - NAVAL AIR STATION NORTH ISLAND, Calif. -- The Honorable Secretary of the Navy Ray Mabus hosts a signing ceremony with the Western Area Power Administration and Sempra U.S. Gas & Power at Naval Base Coronado, Aug. 20. The ceremony marked the signing of the largest renewable energy purchase by a federal entity. Patti Wagner, chief executive officer, Sempra U.S. Gas & Power, and Ron Moulton, senior vice president, Western Area Power, acted as representatives of their respective entities. Distinguished guests were invited to sign a solar panel in honor of the agreement. Brig. Gen. Edward D. Banta, Commanding General, Marine Corps Installations West Marine Corps Base Camp Pendleton, added his signature to the panel. (Photo by Cpl. Asia J. Sorenson/Released)