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The US Missile defense Agency is seeking future missile defense measures that will be able to defeat hypersonic glide vehicles, similar to those being developed by the China, Russia and India.
A highly-publicized test flight of a United States Air Force (USAF) experimental aircraft ended in failure on 14 August. The unmanned aircraft, designated the X-51A “Waverider,” broke apart in midair and crashed into the Pacific Ocean only 31 seconds into its test flight.
The second and final flight test of DARPA’s Hypersonic Test Vehicle 2 (HTV-2) failed today as the capsule, launched by the Minotaur IV missile, was lost upon reentering earth atmosphere, about nine after launch. "We do not yet know how to achieve the desired control during the aerodynamic phase of flight." HTV-2 PM said. DARPA has assembled an independent Engineering Review Board to review and analyze the data collected through the experiment.