An anonymous reader writes to mention that the U.S. Missile Defense Agency and Lockheed Martin recently reported success in the test flight of the Terminal High Altitude Area Defense
(THAAD) missile system. "THAAD is designed to defend U.S. troops, allied forces, population centers and critical infrastructure against short- to intermediate range ballistic missiles. THAAD comprises a fire control and communications system, interceptors, launchers and a radar. The THAAD interceptor uses hit-to-kill technology to destroy targets, and is the only weapon system that engages threat ballistic missiles at both endo- and exo-atmospheric altitudes."