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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 ...
But that’s the case with PennDOT’s Highland Park Interchange Project for which locally based, award-winning artist Brian Peters designed unique sound barrier walls. The wavy design is ...
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