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Jet stream helps comercial fligh reach 801mph
A Virgin Atlantic flight from Los Angeles to London broke an unlikely milestone (and nearly the sound barrier) when it reached a screaming ground speed of 801 mph while traversing the skies some 35,000 feet above central Pennsylvania. (www.popularmechanics.com) 更多...
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this was posted already.. if you did realise, that's fine, but please read what has been posted first! thanks:)
