170402-N-HC646-064 PACIFIC OCEAN (April 2, 2017) The aircraft carrier USS Nimitz (CVN 68) fires a Phalanx Close-In Weapons System (CIWS) during a live-fire exercise. Nimitz is currently underway conducting Composite Training Unit Exercise (COMPTUEX) with the Nimitz Carrier Strike 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 3rd Class Marc O. Cuenca/Released)