Front Matter -- Acknowledgments -- Acknowledgment of Reviewers -- Contents -- Executive Summary -- 1 Introduction -- 2 Science Impact -- 3 Mission Readiness and Cost Assessment -- 4 Policy Issues -- 5 Findings and Recommendations -- Appendixes -- Appendix A: Letter of Request -- Appendix B: Background and Statement of Task -- Appendix C: Input from the Broader Astronomy and Astrophysics Community -- Appendix D: List of Briefings to the Committee -- Appendix E: Request for Information to Mission Teams -- Appendix F: Mission Teams' Technology Funding Inputs to the Committee -- Appendix G: Acronyms -- Appendix H: Glossary -- Appendix I: Biographies of Committee Members and Staff.