PACIFIC OCEAN (Sept. 17, 2020) Secretary of Defense Mark T. Esper answers questions during an all-hands call in the hangar bay of Nimitz-class aircraft carrier USS Carl Vinson (CVN 70). Esper toured the ship's composite warfare commander spaces, receiving in-depth briefs on carrier strike group interoperability and naval power defense. Carl Vinson is currently underway conducting flight deck certification and carrier air traffic control center certification. (U.S. Navy photo by Mass Communication Specialist 3rd Class Aaron T. Smith)