181006-N-GX781-0005 ATLANTIC OCEAN. (Oct. 6, 2018) The Whidbey Island-class amphibious dock landing ship USS Gunston Hall (LSD 44) comes alongside the fleet replenishment oiler USNS John Lethall (T-AO-189) to conduct an underway replenishment. Gunston Hall is underway in support of Trident Juncture 2018. Trident Juncture 18 is a NATO-led exercise designed to certify NATO response forces and develop interoperability among participating NATO and partner nations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Colbey Livingston/Released)