NASA's new X-43A can make this possible.
With a test flight of Mach 7 (5K MPH), this aircraft broke the record set in 1967 last night.
Its design features bringing in O2 for flight as it goes instead of carrying it.
Of course this requires a rocket to first allow it to gain enough speed.
All in all, it is one fast piece of tin foil.
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A jet engine that propels aircraft by igniting fuel mixed with air taken and compressed by the engine in a fashion that produces greater exhaust than intake velocity.