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The Avangard glide vehicle relies on reentry to reach high speeds because it lacks an onboard engine. It is claimed to be able to maneuver while in flight to avoid being intercepted dynamically. As it stands, the U.S. does not have a defense against hypersonic weapons such as Avangard. Combined with blistering speed, maneuverability and long-range flight, these weapons are difficult to track, target and defeat.
