Modern aircraft are able to fly very fast. By "fast" I don't mean speeds 10 times faster than a car, but really FAST. Even without afterburner mode, modern fighters easily overcome the speed of sound. Passenger aviation has long been flying at supersonic speeds. It was possible, but expensive, so (among other things) flying and stopped about 20 years ago. All this is good, but if you dig into the history and archival documents, you can find several aircraft that flew not just on supersonic,...