U.S. Marines with Marine Medium Tiltrotor Squadron 163 (Reinforced), 11th Marine Expeditionary Unit (MEU), perform maintenance on an AV-8B Harrier aboard the amphibious assault ship the USS Makin Island (LHD 8), Dec. 30. The Makin Island Amphibious Ready Group (ARG) and the embarked 11th MEU provide a versatile, sea-based, expeditionary force that can be tailored to a variety of missions in the U.S. 5th Fleet area of responsibility. (U.S. Marine Corps photo by Cpl. Laura Y. Raga/Released)