Editor's note: Boom Supersonic successfully broke the sound barrier with the XB-1 today in a major milestone. Read our coverage here. Boom Supersonic plans to break the sound barrier during a test ...

After years of testing and refinement, a pilot flying the aerospace company’s XB-1 scale prototype finally broke the sound barrier during a livestream event—not once, not twice, but three times.

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IMDb.com, Inc. takes no responsibility for the content or accuracy of the above news articles, Tweets, or blog posts. This content is published for the entertainment of our users only. The news ...