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At 5 Times Speed Of Sound, Boeing's 2-Hour Dare From New York To London

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This week Boeing said it hopes to develop a passenger-carrying hypersonic airliner that would do exactly that, reaching speeds of Mach 5 - about 3,800 mph or roughly five times the speed of sound.

from NDTV News - World-news https://ift.tt/2yV6WJE

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