The single-seat jet, a 201-foot-long test model by Boom Supersonic, hit 844 mph just 12 minutes into its latest test flight ...

Boom, the American company building what promises to be the world's fastest airliner, broke the sound barrier for its first ...

Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed ...

Boom is convinced it can overcome the barriers that grounded the Concorde and make supersonic travel affordable and greener.

The single-seat, three-engine jet is the first independently developed plane to exceed Mach 1 in level flight.