Launch, launch, launch! In March NASA made aviation history with the first flight of a Scramjet-powered airplane at hypersonic speeds. For the next flight of the unpiloted X-43A, NASA is upping the anti and the speed to mock 10, which is 10 times the speed of sound, or about 7,000 miles an hour. With this flight succeeds, it will be the culmination of more than 4 decades of work by generations of researchers. All aimed at proving that a supersonic combustion ramjet, or Scramjet, is a good candidate to propel future high-speed airplanes or space planes. Currently the only option for ultra-high-speed flight in the atmosphere is rocket power. While rockets have served as powerful workhorses since the beginning of the space age, the X-43A Scramjet concept promises even more. A Scramjet-powered vehicle can be significantly lighter by not carrying heavy oxygen tanks as rockets must. Scramjets also offer more airplane-like operations for increased safety, flexibility, and affordability. Launch on my mark. And fourth response is SEP. Two on, two on. Two on, two on, two on. The RV is stable at this time.