170725-M-HF454-035 PACIFIC OCEAN (July 25, 2017) Marines with Marine Medium Tiltrotor Squadron (VMM) 161 (Reinforced) start the engine of an RQ-21A Blackjack unmanned aerial aircraft in preparation for its launch from the amphibious transport dock ship USS San Diego (LPD 22). The 15th Marine Expeditionary Unit (15th MEU) and America Amphibious Ready Group are operating in the U.S. 7th Fleet area of operations to enhance regional partnerships and serve as a ready-response capability for any type of contingency. (U.S. Marine Corps photo by Cpl. Timothy Valero/Released)