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Date: 2015-04-05 16:28:52Manned spacecraft Space stations International Space Station program Commercial Orbital Transportation Services SpaceX Space Shuttle retirement Commercial Crew Development Bigelow Aerospace Orbital Sciences Corporation Spaceflight Human spaceflight International Space Station | Position Paper: Next Generation Space Stations April, 2015 SummaryAdd to Reading ListSource URL: nss.orgDownload Document from Source WebsiteFile Size: 245,88 KBShare Document on Facebook |