About 35,000 feet (10,670 meters) over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first ...
Boom's Supersonic XB-1 jet became the “world’s first independently developed supersonic jet” to break the sound barrier ...
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.
Colorado company Boom Supersonic plans to break the sound barrier with its test plane XB-1 during a test flight this morning, ...