NASA and Alliant Techsystems (ATK) will join forces to accelerate the availability of commercial crew launch services to the International Space Station using the Liberty rocket, a U.S. and European hybrid unveiled earlier this year, officials from the agency and the Minneapolis-based defense and aerospace contractor announced Sept. 13. The 300-ft.-tall Liberty – which incorporates an elongated version of NASA’s space shuttle solid rocket booster as its first stage and the Astrium-built ...


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