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The slow and delicate aircraft taking on spy missions


The normally-benign climate in the South-West US gave the aircraft its best chance of climbing to 66,000ft, twice the al،ude of a commercial jet, wit،ut encountering strong winds that might tip the delicate ma،e over and into a dive earthwards.


منبع: https://www.bbc.co.uk/news/business-66705421?at_medium=RSS&at_campaign=KARANGA