180918-N-VG727-1164 PACIFIC OCEAN (Sept. 18, 2018) A Tomahawk cruise missile launched from the Arleigh Burke-class guided-missile destroyer USS Shoup (DDG 86) impacts on an uninhabited island during a live-fire exercise as part of Valiant Shield 2018 in the Pacific Ocean, Sept. 18, 2018. Valiant Shield is a U.S. only, biennial field training exercise (FTX) with a focus on integration of joint training in a blue-water environment among U.S. forces. This training enable real-world proficiency in sustaining joint forces through detecting, locating, tracking, and engaging units at sea, in the air, on land, and in cyberspace in response to a range of mission areas. (U.S. Navy photo by Mass Communication Specialist 2nd Class William Collins III/Released)