Boom Supersonic's XB-1 demonstrator jet became the first U.S.-made civilian supersonic jet to break the sound barrier. The independently funded XB-1 reached a speed of Mach 1.122, or about 750 mph ...

Boom Supersonic is just hours away from performing ... but still fast enough to cut in half the seven hours that it takes to fly from New York to London on a conventional passenger jet.

The company hopes to help return supersonic airliners to service, potentially cutting flight times in half. Join our Space Forums to keep talking space on the latest missions, night sky and more!

The company claimed the aircraft would cut the travel time from New York to Rome to just four hours and 40 minutes, half the usual eight-hour journey. Last week, Boom Supersonic XB-1 supersonic ...