EAST CHINA SEA (Sept. 18, 2020) A ventilator sits at the foot of a simulated casualty, a U.S Marine with the 31st Marine Expeditionary Unit (MEU), during a mass casualty drill aboard amphibious assault ship USS America (LHA 6). America, flagship of the America Expeditionary Strike Group, 31st Marine Expeditionary Unit team, is operating in the 7th fleet area of operations to enhance interoperability with allies and partners and serve as a ready response force to defend peace and stability in the Indo-Pacific region. (U.S. Marine Corps photo by Cpl. Brandon Salas)