180917-N-OY799-0062 PHILIPPINE SEA (Sept. 17, 2018) The Ticonderoga-class guided-missile cruiser USS Antietam (CG 54) and the Military Sealift Command dry cargo and ammunition ship USNS Caesar Chavez (T-AKE 14) are underway with the Ronald Reagan Carrier Strike Group during a photo exercise for Valiant Shield 2018. The biennial, U.S. only, field-training exercise focuses on integration of joint training among the U.S. Navy, Air Force and Marine Corps. This is the seventh exercise in the Valiant Shield series that began in 2006. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kenneth Abbate/Released)