In the preface to the 9/11 Commission Report, the authors wrote, "We have come together with a unity of purpose because our nation demands it. September 11, 2001, was a day of unprecedented shock and suffering in the history of the United States. The nation was unprepared. How did this happen, and how can we avoid such tragedy again?" Here two 9/11 Commission members ask and try to answer those questions in person. Robert Saldich, Chair of The Club's Executive Committee, moderated the Q&A.

Summary by Commonwealth Club staff.