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Boom Supersonic XB-1 breaks the sound barrier
XB-1's supersonic flight marks the first time an independently developed jet has broken the sound barrier. Nicknamed "Baby Boom," the demonstrator model is a third of the size of the planned ...
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Boom Supersonic's XB-1 jet breaks sound barrier 3 times on final test flight (video, photos)
The XB-1 broke the sound barrier three times during its 13th and final test flight, which lifted off Monday from the Mojave ...