150220-N-LV331-002 - WASHINGTON (Feb. 20, 2015) Secretary of the Navy (SECNAV) Ray Mabus presses a button to fire a round out of a railgun from a control room at the Naval Research Laboratory. During his visit, Mabus spoke with project experts and observed ongoing innovations to electronic warfare systems, anti-submarine warfare projects and autonomous systems. (U.S. Navy photo by Mass Communication Specialist 2nd Class Armando Gonzales/Released)