PACIFIC OCEAN (June 11, 2021) Gunner’s Mate 2nd Class Samuel Smithson, left, a native of Las Vegas, Nevada, teaches Gunner’s Mate Seaman Ethan Syverson, a native of Vancouver, Washington, how to clean the inside of the 5-inch gun barrel aboard the Arleigh Burke-class guided-missile destroyer USS O’Kane (DDG 77), June 11, 2021. O’Kane is currently underway conducting routine maritime operations in the U.S. 3rd Fleet. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jasen Moreno-Garcia)