On its 12th test flight, the Boom XB-1 prototype broke the sound barrier three times and achieved a top speed of Mach 1.1. On its 12th test flight, the Boom XB-1 prototype broke the sound barrier ...

During the XB-1's inaugural mission last month, the jet was piloted by Boom Chief Test Pilot Bill "Doc" Shoemaker, while Test Pilot Tristan "Geppetto" Brandenburg was at the controls of a T-38 ...

Boom Supersonic's XB-1 prototype aces 2nd test flight (photos) — Boom's XB-1 test plane gets FAA green light for supersonic flight "XB-1 continues to perform at progressively faster speeds ...