Boom's recent test flight with the XB-1 aircraft achieved supersonic, with iPhone and Starlink capturing the iconic moments.

A Carnegie Mellon University grad is behind the successful flight earlier this week of the first independently developed jet to break the sound barrier.

Breaking the sound barrier in a privately developed civil aircraft is a significant aviation milestone by any measure. But as the champagne corks popped and the engines on Boom Supersonic’s XB-1 ...