FOX19 - Imagine traveling half way across the world - in just two hours.
A rocket undergoing testing right now in Australia can go more than seven times the speed of sound.
Inside the rocket is an engine that officials believe could be used to power passenger and war planes.
Military scientists from the U.S. and Australia teamed up on the project, which could lead to incredibly fast wartime weaponry, in the next few years.
Officials say going that speed in a passenger plane, is likely still several years away.