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Japan achieves Mach 5 hypersonic engine test milestone

Imagine a world where the grueling seven-hour flight from New York to London is condensed into a lightning-fast sprint of ...
Gadget Review on MSN

Japan tests Mach 5 engine for two-hour Tokyo-LA flights

Japan successfully tests Mach 5 ramjet engine that could cut Tokyo-LA flights from 12 hours to 2 hours, with passenger ...