When President Reagan in his State of the Union address last week talked of a hypersonic jet that could fly from Washington to Tokyo in two hours, skeptics might have thought he was merely dreaming. In fact, the Pentagon and U.S. aerospace companies have been working for several years toward making that vision a reality. The proposed plane, already dubbed the Orient Express, would soar through the atmosphere into space and back, flying at up to 25 times the speed of sound. Though few experts think that the Orient Express will be ready ! for takeoff before the end of this...
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