A manned Shuttle replacement based on the X-37B robot space plane When the Space Shuttle Atlantis touched down for the final time on July 21, 2011, it looked as if the notion of a manned spa... Read more
A manned Shuttle replacement based on the X-37B robot space plane When the Space Shuttle Atlantis touched down for the final time on July 21, 2011, it looked as if the notion of a manned spa... Read more
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