Boom Supersonic sans Sonic boom

Last week, American company Boom Supersonic flew faster than the speed of sound with its XB-1 supersonic demonstrator ...
Two weeks ago, Boom Supersonic’s XB-1 demonstrator plane made history when it broke the sound barrier over the continental ...
Supersonic planes will burn significantly more fuel than current aircraft, resulting in higher emissions of carbon dioxide, ...
Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.