On Monday, the U.S. aborted the testing of an experimental hypersonic weapon within minutes of its launch. Hypersonic speed is the science behind the technology of this weapon.

It is said to be five times faster than the speed of sound (Mach 5), which is 6,200 km per hour at sea level.  

The senior lecturer in high speed Aerodynamics Department at the Imperial College London Dr. Paul Bruce said that when travel is very fast, air starts to heat -- "as if you put air in a flame and made it several thousand degrees".

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