Boom Supersonic sans Sonic boom

A startup wants to revive the Concorde for the generations of flyers that missed out, without the noisy boom and the up to ...
Boom Supersonic’s XB-1 has broken the sound barrier, paving the way for faster commercial flights if future tests succeed.
Boom's Supersonic XB-1 jet became the “world’s first independently developed supersonic jet” to break the sound barrier Tuesday.