As the fifth anniversary of 9/11 approaches, there's been a lot of debate and political mudslinging over a key question: Has the war on terror made the United States any safer? 

Well, there's nobody better qualified to answer that than Lee Hamilton, vice chairman of the 9/11 Commission, member of the President's Advisory Council on Homeland Security, and a distiniguished former Democratic congressman. In this week's Seven Questions, FP spoke with him to get an insider's opinion on what the American government has learned from 9/11, what threats the U.S. still faces, and whether Americans are any safer.