If you've been keeping tabs on aviation news as of late, you saw that Boom Supersonic just recently broke the sound barrier ...
Boom hopes its breakthrough will allow supersonic flights over land, making US coast-to-coast flights 90 minutes faster.
KDVR-TV Denver on MSN1d
Boom Supersonic breaks sound barrier without 'audible boom'A Colorado-based company said it broke the sound barrier three times without generating a sonic boom that reached the ground.
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