Mojave Desert, sound barrier

The test flight took place in the same Mojave Desert area in California where Charles "Chuck" Yeager first broke the sound ...
According to the US company, the most recent and final test flight of XB-1 on February 10 also achieved supersonic speeds ...
A civilian jet broke the sound barrier three times ... the company said. Brandenburg would break the sound barrier twice more during his roughly 20 minutes in the air — his journey ...