Tuesday’s XB-1 flight marks the first human-piloted civil supersonic flight since Concorde’s retirement more than 20 years ...

Colorado company Boom Supersonic plans to break the sound barrier with its test plane XB-1 during a test flight this morning, ...

Almost 22 years after Concorde made its final commercial flights, a prototype passenger jet is attempting to break the sound ...

A US company's prototype jet has broken the sound barrier in a demonstration it hopes will pave the way for a successor to ...

Boom Supersonic, the American company building what promises to be the world’s fastest airliner, broke the sound barrier for ...

Boom’s XB-1 jet breaks sound barrier on first supersonic flight - Boom’s inaugural XB-1 supersonic test flight reached speeds ...

US company Boom has broken the sound barrier during a test flight of its prototype aircraft XB-1. The test opens the way for ...

A supersonic jet built by US company Boom has broken the sound barrier for the first time since the Concorde during a test ...

During the test flight, the aircraft reached an altitude of 34,000ft before accelerating to above Mach 1.0 speed, which is ...

The XB-1 test flight was a unique event that will live on in the history books and has given travelers hope of a return to ...

Boom Supersonic plans to break the sound barrier during a test flight this ... first supersonic passenger jet since the British-French Concorde, which was retired in 2003. "It will still be ...

A prototype of a passenger jet meant to succeed Concorde will attempt to break the sound barrier for the first time on ...