NASA whittles down field of new launch vehicle concepts



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Details of NASA whittles down field of new launch vehicle concepts

About NASA whittles down field of new launch vehicle concepts
NASA whittles down field of new launch vehicle concepts- The Space Launch Initiative (SLI), a NASA-wide effort defining the future of human space flight, has completed its first milestone review -- resulting in a narrower field of potential candidates for the nation's second-generation reusable space transportation system.