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Boom! US jet breaks sound barrier in bid to revive supersonic travel

18 days ago
23

About 35,000 feet (10,670 meters) over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first privately funded airplane to break the sound barrier during a test flight on Tuesday, marking a new step in the firm's bid to revive supersonic air travel. Julian Satterthwaite reports.

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