170220-N-DA275-040 PACIFIC OCEAN (Feb. 20, 2017) Fire Controlman 3rd Class Alicia Mata, from Houston, prepares to conduct maintenance on a close in weapon system aboard the aircraft carrier USS Nimitz (CVN 68). Nimitz is underway conducting fleet replacement squadron carrier qualifications. (U.S. Navy photo by Mass Communication Specialist 3rd Class Samuel Bacon/Released)