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Date: 2014-05-08 10:59:23Mars exploration Space policy Space Shuttle program Spacecraft Manned mission to Mars Space exploration NASA Apollo program Moon landing Spaceflight Human spaceflight Exploration of the Moon | Hard Choices for Manned Spaceflight: America as IcarusAdd to Reading ListSource URL: csis.orgDownload Document from Source WebsiteFile Size: 301,50 KBShare Document on Facebook |