PACIFIC OCEAN (April 19, 2021) A U.S. Navy MH-60S Sea Hawk assigned to Helicopter Sea Combat Squadron (HSC) 21 retrieves cargo from the fleet replenishment oiler USNS Henry J. Kaiser (T-AO 187) during a vertical replenishment-at-sea. The Marines and Sailors of the 11th Marine Expeditionary Unit are conducting routine training as part of the Essex Amphibious Ready Group (ARG). Together, the 11th MEU, Amphibious Squadron (PHIBRON) 1, and ships are designated as an ARG. (U.S. Marine Corps photo by Sgt. Alexis Flores)