We took off and soared 10 miles up into the stratosphere, higher than any human had ever been except for the odd astronaut. As you flew higher and faster there were the tiny bumps when you passed Mach One, the speed of sound, and Mach Two, twice the speed of sound (1,350 miles per hour), and there was the applause and later, when regular services began, the champagne and caviar. Out of the window you could see the curve of the earth, a shimmering outline against a dark thin sky of a tremulous blue-black. It took three hours and 20 minutes to cross the Atlantic; it was dazzling, all right, the most glamorous piece of technology anyone could imagine.