Boom Supersonic's XB-1 breaks sound barrier 3 times

Thanks to upgraded engines and advanced computers that monitor weather in real time, Boom Supersonic achieved the holy grail ...
The XB-1 broke the sound barrier three times during its 13th and final test flight, which lifted off Monday from the Mojave ...
Planes carry transponders that transmit their real-time location. The Alaska plane stopped sharing that data on Thursday.