NEWPORT NEWS, Va. (Sept. 8, 2021) Hospital Corpsman 2nd Class Yesenia Ocenasek, right, assigned to the dental department aboard the Nimitz-class aircraft carrier USS George Washington (CVN 73), administers a COVID-19 vaccine to Aviation Ordnanceman 2nd Class Gunner Collado, assigned to the Nimitz-class aircraft carrier USS John C. Stennis (CVN 74). George Washington is undergoing refueling complex overhaul (RCOH) at Newport News Shipbuilding. RCOH is a multi-year project performed only once during a carrier�s 50-year service life that includes refueling the ship�s two nuclear reactors, as well as significant repairs, upgrades, and modernization. (U.S. Navy photo by Mass Communication Specialist 2nd Class Robert Stamer)