This hypersonic airliner would take you from Los Angeles to Tokyo in under two hours
The 300-passenger Stratofly MR3 would hit speeds of up to 5,400 miles an hour. Just don't expect to book a flight anytime soon.
from NBC News Top Stories https://ift.tt/2Hk84YL
from NBC News Top Stories https://ift.tt/2Hk84YL
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