171002-M-CK339-011 MEDITERRANEAN SEA (Oct. 2, 2017) Marines assigned to the 15th Marine Expeditionary Unit’s (15th MEU) Unmanned Aerial Surveillance unit, retrieve an RQ-21A Blackjack small tactical unmanned aircraft system aboard the San Antonio-class amphibious transport dock ship USS San Diego (LPD 22). San Diego is deployed to support maritime security and theater security cooperation in efforts in the U.S. 6th Fleet area of operations. (U.S. Marine Corps photo by Lance Cpl. Jeremy Laboy/Released)