Boom's XB-1 supersonic jet has been authorized to break the speed of sound

Boom's supersonic XB-1 test jet has received Federal Aviation Administration (FAA) approval to fly past Mach 1, the company announced. Tests are slated to take place later this year at the Black Mountain Supersonic Corridor in Mojave, CA, and the results could help prove the feasibility of the design in areas like fuel consumption, speeds and flight characteristics. "Following XB-1's successful first flight, I'm looking forward to its historic first supersonic flight," said Boom Supersonic found...