U.S. Marines with Weapons Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, battle-sight zero their weapons prior to a combat marksmanship qualification course aboard the USS Anchorage (LPD 23) at sea in the Pacific Ocean, May 30, 2015. The Marines of the 15th MEU constantly refine their combat skills to stay prepared for anything they may encounter throughout deployment. (U.S. Marine Corps photo by Cpl. Steve H. Lopez/Released)