An AV-8B Harrier attached to the 13th Marine Expeditionary Unit takes on fuel during an aerial refueling exercise above Africa Nov. 18. 2013. The 13th MEU is deployed with the Boxer Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. 5th Fleet area of responsibility. (USMC photo by SSgt. Matt. Orr/Released)