171221-N-ZK016-0025 MAYPORT, Fla. (Dec. 21, 2017) Secretary of Defense Jim Mattis arrives on the brow of the amphibious assault ship USS Iwo Jima (LHD 7) prior to an all-hands call with Sailors and Marines assigned to commands throughout the Jacksonville, Florida Navy Tri-base area. (U.S. Navy photo by Mass Communication Specialist 3rd Class Joe J. Cardona Gonzalez/Released)