FrontMatter -- Preface -- Acknowledgment of Reviewers -- Contents -- Summary -- 1 Overview of Analysis and Findings -- 2 Why Do We Go There? -- 3 Public and Stakeholder Attitudes -- 4 Technical Analysis and Affordability Assessment of Human Exploration Pathways -- Appendixes -- Appendix A: Statement of Task -- Appendix B: Methodological Notes About the Public Opinion Data -- Appendix C: Stakeholder Survey Methods -- Appendix D: Stakeholder Survey Mail Questionnaire (Version A) -- Appendix E: Frequency Distributions of Responses to the Stakeholder Survey by Respondent Group -- Appendix F: Acronyms and Abbreviations -- Appendix G: List of Briefings to the Committee and Panels -- Appendix H: List of Input Papers -- Appendix I: Committee, Panel, and Staff Biographies.