SpaceShipOne Breaks the Sound Barrier Today, a significant milestone was achieved by Scaled Composites: The first manned supersonic flight by an aircraft developed by a small company's private, non-government effort. In 1947, fifty-six years ago, history's first supersonic flight was flown by Chuck Yeager in the Bell X-1 rocket under a U.S. Government research program. Since then, many supersonic aircraft have been developed for research, military and, in the case of the recently retired Concorde, commercial applications. All these efforts were developed by large aerospace prime companies, using extensive government resources. Our flight this morning by SpaceShipOne demonstrated that supersonic...