Every American remembers exactly how it unfolded and where they were and what they were doing on that terrible morning of September 11. And like any other unprecedented historic jolt, September 11 continues to roil our collective mind. We still ponder the questions it raised: What changed that day? What remains of the old? What is truly new? The essays in this collection examine these and other questions, taking a sometimes sobering, sometimes uplifting look at a historic turning point in our lives. The contributors examine the challenges and dangers of our new foreign policy and the sense that we have only seen the opening stage of a long-term realignment. They also examine our domestic politics, revealing that, with the exception of national security matters, partisan considerations remain as strong as before. A look at the Islamic world after 9/11 shows how, as never before, it is understood that American assertiveness is the main deterrent against Islamist terror and a stabilizing force in an unsteady cultural sphere.