A CH-53E Super Stallion approaches the flight deck of USS San Diego (LPD 22) to deliever personnel and equipment during the Certification Exercise, May 31, 2017. CERTEX is the final at-sea training period to certify the 15th Marine Expeditionary Unit and America Amphibious Ready Group in preparation for their upcoming deployment. The aircraft is with Marine Medium Tiltrotor Squadron 161 (Reinforced) attached to the 15th MEU. (U.S. Marine Corps photo by Cpl. Timothy Valero)