The Concorde, the world’s only commercial supersonic jet, was the big, clunky plastic phone that the very wealthy first had in their cars, while the new breed of supersonic jet is a flip phone with a keyboard that, according to supersonic’s believers, will eventually morph into the sleek, multifunction supercomputer that has become so affordable that it’s available to almost everyone. Exosonic, which is developing unmanned supersonic drones for military training and a 70-seat passenger jet, expresses a similar goal on sound, and is part of the group rallying to change the current law.  Will They Ever Take Off?

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