151014-N-LV331-001 WASHINGTON (Oct. 14, 2015) Secretary of the Navy (SECNAV) Ray Mabus hosts an energy innovation discussion with industry leaders at National Defense University. Mabus spoke about the role the Department of the Navy has in energy innovation, as well as the broader relationship between energy and national security. (U.S. Navy photo by Mass Communication Specialist 2nd Class Armando Gonzales/Released)