121212-N-VN372-001 PORT HUENEME, Calif. (Dec. 12, 2012) Sailors from Naval Mobile Construction Battalion 3 begin a 1.5-mile run during the Physical Fitness Assessment at Naval Base Ventura County. The Navy's PFA ensures Sailors maintain optimal health through balanced physical and mental stamina. NMCB 3 provides combatant commanders and Navy component commanders with combat-ready warfighters capable of general engineering, construction and limited combat engineering across the full range of military operations. (U.S. Navy photo by Mass Communications Specialist 1st Class Petty Officer Chris Fahey/Released)