Thanks to upgraded engines and advanced computers that monitor weather in real time, Boom Supersonic achieved the holy grail ...

On its 12th test flight, the Boom XB-1 prototype broke the sound barrier three times and achieved a top speed of Mach 1.1.

During the second supersonic flight of the XB-1 technology demonstrator today, the jet exceeded Mach 1 three times without a ...

Boom Supersonic's XB-1 demonstrator aircraft soared past the speed of sound in a test flight on Tuesday—the first time a plane has accomplished that feat without the fuels of government direction, ...

The single-seat, triple-engine testbed plane took off from ... This was the first time a civil aircraft had broken the sound barrier in level flight since the final flight of the Aérospatiale ...

Authorities are searching part of Alaska's western coast for an aircraft that went missing while carrying 10 people.