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They didn't have environmental concerns like they do today, during the 1960's and 1970's. For awhile, they were worried the world would freeze-over!

Yeah, funny. Nowadays they think promote that terrorists are the greatest threat. So every time has it's .. specials. The simple 'qui bono?' always remained though.


As long as then don't build cities on water, the Pacific and Atlantic would make a great place to fly even with a sonic boom. Wait, didn't they have such routes already?  ::) The sonic boom did not end anything there.  8-)
As not only Mr. Branson shows these days, every technology needs a demand and a basis to make money with. The rest then follows, including popular concerns (as valid as they might be).

I'm sorry, Peter, I can't follow you on those 'NASA talks' you mention. I can't relate the passenger size of a plane to the actual supersonic boom appearance and/or avoidance. Please explain that in more detail if you like. Me is interested.  :)