Hypersonic missiles are five times faster than the speed of sound but their development is tricky. So far, only a few countries have been able to test true hypersonic weapons.
The US Army and Navy plan to launch a series of three flight tests with the future Common-Hypersonic Glide Body (C-HGB) by the end of the year, in anticipation of fielding the weapon in 2023. Bob Strider, the army's Rapid Capabilities and Cr.
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