While the SR-71 Blackbird gets all the press, the rocket-powered X-15 has its own richly deserved place in the aviation history record books: on October 3, 1967, U.S. Air Force test pilot William ...

An aircraft capable of hitting 4,520 mph (nearly seven times the speed of sound) is ludicrous to even think about, but the North American X-15 achieved this, defying comparison to any other aircraft ...