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Date: 2013-07-28 13:05:20SpaceX CST-100 Commercial Crew Development Falcon 9 Dragon Dream Chaser HL-20 Personnel Launch System Atlas V Launch escape system Spaceflight Human spaceflight Manned spacecraft | National Aeronautics and Space Administration Commercial Crew Program StatusAdd to Reading ListSource URL: www.nasa.govDownload Document from Source WebsiteFile Size: 3,13 MBShare Document on Facebook |