Boom Supersonic sans Sonic boom

More than 20 years since the final Concorde flight, is a small US start-up now on course to bring back supersonic air travel?
Boom Supersonic’s XB-1 creates a sonic boom inaudible from the ground below when flying at the exact right speed and altitude ...
Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.
NASA and Lockheed Martin’s Quesst project aims to show sonic boom can be dissipated to manageable levels. They plan to ...