Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed ...

Boom's Supersonic XB-1 jet became the “world’s first independently developed supersonic jet” to break the sound barrier ...

The XB-1 aircraft accelerated to Mach 1.05 within about 11 minutes of taking off, according to Boom Supersonic and live video of the test flight.

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ESPN BET Sportsbook is owned and operated by PENN Entertainment, Inc. and its subsidiaries ('PENN'). ESPN BET is available in states where PENN is licensed to offer sports wagering. Must be 21+ to ...

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Heavy snow blanketed South Korea for the second consecutive day Tuesday, disrupting transportation services and causing traffic congestion for people heading to their hometowns for... Traffic on major ...