Boom Supersonic sans Sonic boom

Two weeks ago, Boom Supersonic’s XB-1 demonstrator plane made history when it broke the sound barrier over the continental ...
Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.
Boom Supersonic will break the sound barrier again Monday, after a successful flight last month. On Feb. 10, Boom Supersonic ...