The U.S. Missile Defense Agency (MDA) is a government organization responsible for developing and implementing missile defense systems to protect the United States and its allies from missile threats. Established in 2002, the MDA focuses on detecting, tracking, and intercepting incoming missiles, including ballistic and cruise missiles. The agency works on various technologies and systems, such as Ground-based Midcourse Defense (GMD) and Aegis Ballistic Missile Defense, to enhance national security. The MDA collaborates with other branches of the military, government agencies, and international partners to ensure a comprehensive defense strategy against potential missile attacks.