180821-N-HE318-1064 EAST CHINA SEA (Aug. 21, 2018) A Mark 45 5-inch gun weapon system fires ordinance during a live-fire weapon training exercise aboard the Ticonderoga-class guided-missile cruiser USS Antietam (CG 54). Antietam is forward-deployed to the U.S. 7th Fleet area of operations in support of security and stability in the Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 2nd Class William McCann/Released)