Engineman 3rd Class Amell Trevino, from Edinburg, Texas, and Chief Engineman Melanie Israel, from Klamath Falls, Ore., hold parts after replacing a head gasket on an engine aboard the amphibious transport dock ship USS Mesa Verde (LPD 19). Mesa Verde sailors and 22nd Marine Expeditionary Unit Marines are participating in a composite training unit exercise in preparation for deployment. (U.S. Navy photo by Mass Communication Specialist 3rd Class Shannon M. Smith/Released)