FORT HUNTER LIGGETT, Calif. (Aug. 16, 2007) - Construction Electrician Constructionman Daniel J. Nelson uses a trencher to dig a path for underground communications wire during Operation Bearing Duel 6-07. Nelson is one of more than 450 Seabees of Naval Mobile Construction Battalion (NMCB) 5 taking part in the field exercise, an annual requirement to ensure that battalions are ready to be deployed. U.S. Navy photo by Mass Communication Specialist 3rd Class Patrick W. Mullen III (RELEASED)