Sergeant Oscar A. Avila, the fire direction control chief with 81mm Mortar/Tactical Recovery of Aircraft and Personnel Platoon, Weapons Company, Battalion Landing Team 3/5, 15th Marine Expeditionary Unit, conducts a warrior study with Marines from his platoon, on the flight deck of the USS Peleliu, Sept. 20. Avila, 26, is from Oxnard, Calif.