NORTH CHANNEL (April 2, 2019) The Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) transits the North Channel during exercise Joint Warrior 19-1, April 2, 2019. Joint Warrior is a United Kingdom-led, multinational exercise in a robust maritime training environment in which allies and partners can improve interoperability and prepare forces for combined operations. (U.S. Navy photo)