This final status report describes the actions taken by NASA in response to the recommendations of the Presidential Commission on the Space Shuttle Challenger Accident (Mission 51-L). The Commission recommendations and NASA's responses to them are summarized in the Executive Summary, which is accompanied by a schedule showing significant program milestones.

Part 1 of the report provides a detailed discussion of the activities undertaken by NASA to implement each of the nine Commission recommendations; Part 2 discusses other related NASA actions required for safe return to flight. A copy of the interim plan submitted to the President one year ago and other significant reference documents are included as appendixes.

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