U.S. Navy Seaman Apprentice Ethan Kerber, Naval Mobile Construction Battalion 3 from Port Hueneme, Calif., prepares to weld a lateral reinforcement to a section of a 2.4 kilometer perimeter fence here May 29. The reinforcement supports the fence line integrity and is needed every 30 meters. The battalion constructed the fence around the Bosnian-Herzegovinian military compound to meet force protection requirements for the participants of Shared Resilience 2012, a two-week U.S. Joint Chiefs of Staff sponsored medical exercise. NMCB 3 is an expeditionary naval construction element currently assigned to U.S. Naval Forces Europe 6th Fleet's Task Force 68 to provide construction, engineering and security services that support national strategy, naval power projection, humanitarian assistance and contingency operations.