PHILIPPINE SEA (Jan. 21, 2021) A close-in weapon system (CIWS) fires during a pre-action aim calibration fire exercise aboard the Nimitz-class aircraft carrier USS Carl Vinson (CVN 70), Jan. 21, 2021. Operating as part of U.S. Pacific Fleet, USS Carl Vinson is conducting training to preserve and protect a free and open Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist Seaman Sophia Simons)