The SM-3 is a type of missile designed for use in missile defense systems. It is primarily used by the United States Navy to intercept and destroy short- to intermediate-range ballistic missiles during their midcourse phase of flight. The missile is launched from Aegis-equipped ships and is part of the broader Aegis Ballistic Missile Defense system. Developed by Raytheon and Mitsubishi Heavy Industries, the SM-3 has undergone several upgrades since its introduction. It features advanced guidance systems and a kinetic warhead, allowing it to collide with and neutralize incoming threats. The missile plays a crucial role in enhancing national and allied security against missile attacks.