Missile defense refers to a system designed to detect, track, intercept, and destroy incoming missiles before they can reach their targets. These systems are crucial for protecting nations from potential threats, such as ballistic missiles or cruise missiles. They use various technologies, including radar and interceptor missiles, to neutralize threats in the air. Countries around the world invest in missile defense to enhance their security. Notable examples include the United States with its Ground-based Midcourse Defense and Aegis Ballistic Missile Defense systems, and Israel with its Iron Dome, which is specifically designed to intercept short-range threats.