The USS San Diego cruises in the water as part of a maritime interdiction operations (MIO) training exercise conducted during Certification Exercise (CERTEX) off the coast of Southern California, June 11, 2014. CERTEX serves as the final at-sea period for the 11th Marine Expeditionary Unit and Amphibious Squadron 5. It is designed to strengthen the blue-green team's ability to operate together and to respond to various situations while deployed. (U.S. Marine Corps photo by Gunnery Sgt. Rome M. Lazarus/Released)