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

The test flight took place in the same Mojave Desert area in California where Charles "Chuck" Yeager first broke the sound ...

The dream of supersonic travel has come roaring back to life as a cutting-edge test plane shattered the sound barrier in ...

The Concorde's record-breaking flights went up to Mach 2.04. Boeing looked at a supersonic bomber designed to outrun enemy aircraft for ... to return to the drawing board. They came back with ...