Mach 5, Anyone? Supersonic Flight Is Again Poised for Takeoff
Since the last commercial supersonic flight 11 years ago, the world has accelerated in every respect but one: Instead of increasing speed, airlines have focused on driving down costs by commissioning ever-bigger planes crammed with ever more people. In 2003, for example, a Boeing 747-400 configured for three classes could carry 416 passengers; today’s Airbus A380 can accommodate 525.
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