English English English English English faster than sound – 768 mph English English English English English English supersonic speed English faster than sound – 768 mph English Supersonic speed English English supersonic speed English English English http://en.wikipedia.org/wiki/Supersonic_speed despite rumors English English English English English Supersonic speed English Wikipedia English English English supersonic English English English English Supersonic speed Engelse Wikipedia English http://en.wikipedia.org/wiki/Supersonic_speed English English supersonic speed English supersonic speeds English English English supersonic speed English English despite rumors English English English