The Missile Defense Agency (MDA) is a part of the United States Department of Defense responsible for developing and deploying systems to protect the nation from missile threats. Its primary focus is on intercepting and destroying incoming ballistic missiles before they can reach their targets. The MDA works on various technologies, including ground-based interceptors, radar systems, and space-based sensors. These systems are designed to detect, track, and neutralize missiles launched from hostile nations, ensuring the safety and security of the U.S. and its allies against potential attacks.