151212-N-OF476-030 PACIFIC OCEAN (Dec 12, 2015) An MV-22 Osprey assigned to Marine Medium Tilt Squadron (VMM) 166 (Reinforced) launches from amphibious assault ship USS Boxer (LHD 4) in support of a long-range raid exercise. The Boxer Amphibious Ready Group (ARG) is underway off the coast of Southern California completing a certification exercise (CERTEX). CERTEX is the final evaluation of the 13th Marine Expeditionary Unit (13th MEU) and Boxer ARG prior to deployment and is intended to certify their readiness to conduct integrated missions across the full spectrum of military operations. (U. S. Navy photo by Mass Communication Specialist Seaman Eric C. Burgett/Released)