Chief Warrant Officer John Sullivan, officer in charge of Mobile Diving and Salvage Unit (MDSU) 2, Company 2-4, awaits further dive instruction during a demonstration at Joint Expeditionary Base Little Creek-Fort Story for Navy Junior Reserve Officer Training Corps (NJROTC) students from David Crockett High School on Oct. 1. (U.S. Navy photo by Mass Communication Specialist 3rd Class Randy Savarese/Released)