PACIFIC OCEAN (July 19, 2021) Aviation Ordnanceman Airman Apprentice Angel Garcia-Rivera, from San Juan, Puerto Rico, performs preventative maintenance on an M61 A2 20mm gun system aboard Nimitz-class aircraft carrier USS Carl Vinson (CVN 70), July 19, 2021. Carl Vinson is currently underway conducting routine maritime operations in U.S. 3rd Fleet. (U.S. Navy photo by Mass Communication Specialist Seaman Elisha Smith)