170404-N-HV059-073 ATLANTIC OCEAN. (April 4, 2017) Sailors assigned to the guided-missile cruiser USS Leyte Gulf (CG 55) sand the barrel of a Mark 45 5-inch gun prior to for painting them. Leyte Gulf is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Sonja Wickard/Released)