On July 27, 1949, the world quite abruptly became a very small place. The new scale, which drew together cities and coastlines that had for millennia existed on basically separate planets, came courtesy of the de Havilland Comet, the first commercial jet aircraft to enter production. With its pressurized cabin, it could travel as high as 42,000 feet, and, courtesy of four turbojet engines offering 22,000 Newtons of thrust each, it cruised at 460 miles per hour.
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