Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed ...
Tuesday’s XB-1 flight marks the first human-piloted civil supersonic flight since Concorde’s retirement more than 20 years ...
More than two decades after Europe’s failed attempt at a supersonic airliner, the USA is on track to make it work. View on ...