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Duncan Walker of the BBC writes:
The prospect of a revolution in air travel has been raised by Nasa’s successful test of a 5,000mph plane. But are we likely to see similar advances in other forms of transport?
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Duncan Walker of the BBC writes:
The prospect of a revolution in air travel has been raised by Nasa’s successful test of a 5,000mph plane. But are we likely to see similar advances in other forms of transport?