170326-N-XL056-060 PACIFIC OCEAN (March 26, 2017) The aircraft carrier USS Nimitz (CVN 68) fires a Phalanx Close-In Weapons System (CIWS) during a live-fire exercise. Nimitz is underway conducting Composite Training Unit Exercise (COMPTUEX) with its carrier strike group in preparation for an upcoming deployment. COMPTUEX tests a carrier strike group's mission-readiness and ability to perform as an integrated unit through simulated real-world scenarios. (U.S. Navy photo by Mass Communication Specialist Seaman Leon Wong/Released)