The U.S. Army's hypersonic weapon prototype
streaked across the Pacific Ocean at several times the speed of sound
Thursday, Nov. 17, in a flawless maiden test flight. The success could
pave the way for a new military capability to strike targets anywhere on
Earth in as little as an hour.
Such a hypersonic weapon concept flies at a
relatively flat trajectory within the atmosphere, rather than soaring up
toward space like a ballistic missile and eventually coming back down.
Hypersonic speed is defined as being at least five times the speed of
sound (3,805 mph, or 6,124 kph, at sea level). Read Full
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