30 minutes from LA to NYC:
An experimental jet engine has been successfully tested at speeds of up to 11,000 km (6,835 miles) per hour, or 10 times the speed of sound, during trials in Australia's outback, defense scientists said on Friday.
The experimental scramjet engine is an air-breathing supersonic combustion engine being developed by Australian and U.S. defense scientists that researchers hope will lead to super-high speed flight.
That's also about three times the speed of a .30-06 bullet.
Superman is now a distinct #2.
HT: Hot Air
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