Boom Supersonic sans Sonic boom

Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.
The scaled-down prototype, nicknamed the "Baby Boom", broke the sound barrier for the first time during a test flight over ...
It was a step toward reviving supersonic commercial travel, which has been on hiatus since Concorde was grounded more than two decades ago. Boom Supersonic has contracts with at least two ...