200601-N-VY537-468 PORT HUENEME, Calif. Builder 2nd Class Juan Gonzalezrivera, assigned to Naval Mobile Construction Battalion (NMCB) 4, directs the placement of a portion of the base support system for a timber tower under construction during the battalion’s technical exercise. Seabees are the expeditionary engineering and constructions experts of the naval service. They provide task-tailored, adaptable and combat-ready engineering, and construction forces that deploy to support Navy objectives globally. (U.S. Navy photo Lt. j. g. Wesley Richins/Released)