180520-N-ZK016-0033 U.S. 5TH FLEET AREA OF OPERATIONS (May 20, 2018) A Mark 38 25mm machine gun system fires during a live-fire exercise aboard the Wasp-class amphibious assault ship USS Iwo Jima (LHD 7), May 20, 2018. Iwo Jima, homeported in Mayport, Fla., is on deployment to the U.S. 5th Fleet area of operations in support of maritime security operations to reassure allies and partners, and preserve the freedom of navigation and the free flow of commerce in the region. (U.S. Navy photo by Mass Communication Specialist 3rd Class Joe J. Cardona Gonzalez /Released)