Preface...........................................1 Chapter I - Introduction......................................2 Chapter II - Events Leading Up to the Challenger Mission......10 Chapter III - The Accident.....................................19 Chapter IV - The Cause of the Accident........................40 Chapter V - The Contributing Cause of the Accident...........82 Chapter VI - An accident Rooted in History...................120 Chapter VII - The Silent Safety Program.......................152 Chapter VIII - Pressures on the System.........................164 Chapter IX - Other Safety Considerations.....................178 Recommendations.................................198 The Commission..................................202 The Staff.......................................204 Appendix A - Commission Activities...........................206 Appendix F - Personal Observations on Reliability of Shuttle