171221-N-RL456-0016 MAYPORT, Fla. (Dec. 21, 2017) Secretary of Defense Jim Mattis passes through side boys as he arrives aboard the amphibious assault ship USS Iwo Jima (LHD 7) to speak during 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 2nd Class Hunter S. Harwell/Released)