with some meteors creating a 'sonic boom' as they break the sound barrier, in a similar way to a fast-moving aircraft. Since meteors can be over a hundred kilometres in altitude, and their sound ...
So while XB-1 didn't break the Sound Barrier, it came very close, and parts of the aircraft were subjected to the conditions they will experience flying at Mach 1.1. XB-1 will also likely hit that ...