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Twenty-Five Years After 9/11: Lessons Learned and Unlearned
Thu, September 10th, 2026
Live Online
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September 11, 2001, was the second deadliest day on American soil in the country’s history, exceeded only by a single day during the 1862 Battle of Antietam. Events that day produced a rare moment of national unity, only to give way to controversy and heightened divisions over the American response. It would lead to the two longest wars in U.S. history, a global war on terror and a rethinking of America’s counter-terrorism policy.
Twenty-five years later, what are the lessons—learned and unlearned—from that fateful day? And what have been the long-lasting consequences and implications for U.S. foreign policy and national security?
Join Aaron David Miller as he engages the Brookings Institution's Philip Gordon, the McCain Institute’s Nick Rasmussen, and The New Yorker's Susan B. Glasser on the impact of September 11th, on the next Carnegie Connects.
Carnegie does not take institutional positions on public policy issues; the views represented herein are those of the author(s) and do not necessarily reflect the views of Carnegie, its staff, or its trustees.
Event Speakers
Senior Fellow, American Statecraft Program
Aaron David Miller is a senior fellow at the Carnegie Endowment for International Peace, focusing on U.S. foreign policy.
Philip Gordon
Sidney Stein, Jr. Scholar, Brookings Institution
Phil Gordon is the Sidney Stein, Jr. Scholar at the Brookings Institution and has served in numerous senior government positions, including Assistant to the President and National Security to the Vice President, White House Coordinator for the Middle East, North Africa and the Gulf, and Assistant Secretary of State for European and Eurasian Affairs. He is the author of numerous books and articles on foreign policy and national security including Losing the Long Game: The False Promise of Regime Change in the Middle East.
Nicholas Rasmussen
Senior Advisor for National Security and Leadership Programs, McCain Institute
Nicholas Rasmussen serves as the Senior Advisor for National Security & Leadership Programs at the McCain Institute. He has served as a leading U.S. official on national security, intelligence, and counterterrorism for more than three decades. His principal areas of expertise include national security strategy, policy and decision-making, terrorism/counterterrorism and violent extremism, and the nexus between national security and technology.
Susan B. Glasser
Staff Writer, The New Yorker
Susan B. Glasser, a staff writer at The New Yorker based in Washington, D.C., writes a weekly column on life in Washington and is a host of the Political Scene podcast. Glasser has served as the top editor of several Washington publications, including Politico, where she founded the award-winning Politico Magazine, and Foreign Policy, which won three National Magazine Awards, among other honors, during her tenure as editor-in-chief.