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Boom Supersonic's next-generation XB-1 passenger plane 1 step away from breaking the sound barrier
Boom Supersonic's XB-1 demonstrator craft could become the first commercial jet to break the sound barrier since Concorde after acing its 11th test and reaching 0.95 Mach at low altitudes.
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Boom Supersonic to break sound barrier during historic test flight today: Watch live
Boom Supersonic plans to break the sound barrier during a test flight this morning (Jan. 28). This would mark the first time ...