Key Points and Summary - The secretive SR-72 "Darkstar" is Lockheed Martin's ambitious project to build a Mach 6+ hypersonic ISR and strike aircraft. -Its success hinges on a revolutionary and highly ...

Key Points and Summary - This analysis debates the U.S. Air Force's need for the secretive, Mach 6+ SR-72 hypersonic aircraft. -Proponents laud its game-changing speed, arguing it can penetrate any ...