Boom Supersonic sans Sonic boom

Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.
In extreme cases they can shatter windows and damage buildings. In the early 1970s, sonic boom concerns led the United ...
Boom Supersonic will break the sound barrier again Monday, after a successful flight last month. On Feb. 10, Boom Supersonic will perform another supersonic flight with its ...