U.S. Marines with India Company, Battalion Landing Team, 3rd Battalion, 5th Marine Regiment, 15th Marine Expeditionary Unit (MEU) line up to receive ammunition before battle sight zero (BZO) operations aboard the amphibious transport dock ship USS Green Bay (LPD 20) Oct. 23, 2012, in the Pacific Ocean. The Marines used BZO to align their weapons' sights and optics to ensure accurate aim when firing at targets. The 15th MEU was deployed as part of the Peleliu Amphibious Ready Group conducting maritime security operations and theater security cooperation efforts. (U.S. Marine Corps photo by Cpl. Bobby J. Gonzalez/Released)