A version of this article appears in the June 9 edition of Aviation Week & Space Technology. Boeing and Sierra Nevada Corp. are in the midst of key tests and final critical design reviews (CDR) as NASA prepares to award Commercial Crew Transportation Capability (CCtCap) contracts under the second phase of its plan to certify a U.S.-developed means of transporting astronauts to the International Space Station starting in 2017. “The competition for the next phase is ongoing, and ...


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