Richard N. Haass argues that 9/11 was a terrible tragedy by any measure, but it was not a historical turning point that heralded a new era of international relations in which terrorists with a global agenda prevailed, or in which such spectacular terrorist attacks became commonplace.

Edward Alden and Liam Schwartz recommend a visa screening system that will benefit U.S. security and the economy by focusing scrutiny on high-risk travelers and speeding approval for low-risk ones.

President Obama gave these remarks at the Pentagon Memorial Service in remembrance of 9/11, on September 11, 2012.

Republican vice presidential candidate Paul Ryan gave these remarks on September 11, 2012.

Republican presidential candidate Mitt Romney gave this statement on September 11, 2012.

President Obama gave these remarks on September 11, 2011, in Washington, DC. He also gave a weekly address that "pays tribute to the first responders, those who have served, and those who lost their lives ten years ago in the September 11^th attacks".

This public law, 107-40 [S. J. RES. 23], was passed by Congress on September 14, 2001 and signed by President George W. Bush on September 18, 2001. The law authorized U.S. armed forces to use "all necessary and appropriate force against those nations, organizations, or persons he determines planned, authorized, committed, or aided the terrorist attacks that occurred on September 11, 2001".

A panel of experts discuss the new HBO documentary film, Manhunt, which details the hunt for Osama bin Laden.

Experts examine the strategic and tactical policies of the United States in regards to homeland security, as part of a CFR symposium, 9/11: Ten Years Later.

Richard A. Falkenrath, John McLaughlin, and Juan Zarate discuss the extent to which the U.S. is still vulnerable, as part of a CFR symposium, 9/11: Ten Years Later.

Philip Zelikow discusses security paradigms and their potential futures since 9/11, as part of a CFR symposium, 9/11: Ten Years Later.

A panel of experts discuss the new HBO documentary film, Manhunt, which details the hunt for Osama bin Laden.

Experts examine the strategic and tactical policies of the United States in regards to homeland security.

This session was part of a CFR symposium, 9/11: Ten Years Later, which was made possible by the generous support of Shelby Cullom and Kathryn W. Davis.

Experts discuss how changes to U.S. domestic and international policy since September 11, 2011 have enhanced counterterrorism approaches and contributed to preventing planned terrorist attacks.

This session was part of a CFR symposium, 9/11: Ten Years Later, which was made possible by the generous support of Shelby Cullom and Kathryn W. Davis.

Philip Zelikow, former executive director of the 9/11 Commission Report, presses the need to hold trials for the 9/11 conspirators and explores the findings of the report.

This session was part of a CFR symposium, 9/11: Ten Years Later, which was made possible by the generous support of Shelby Cullom and Kathryn W. Davis.

This video is part of a special Council on Foreign Relations series that explores how 9/11 changed international relations and U.S. foreign policy. In this video, James M. Lindsay, Senior Vice President, Director of Studies, and Maurice R. Greenberg Chair at the Council on Foreign Relations traces the shifts in the balance of power in American politics following the terrorist attacks of Sept. 11, 2001. "What we witnessed in the months after the attack was a political dynamic as old as the American republic. When the country feels imperiled, the White House gains in power and Congress loses it," says Lindsay. However, ten years after the attacks, "the era of terrorism has given way to the era of fiscal austerity," Lindsay argues, and "we now have American politics that looks more normal, that is much more focused inward, and features much more heated battles between Capitol Hill and the White House."

Laurie Garrett, senior fellow for global health at the Council on Foreign Relations, explores the lasting impact of the terrorist attacks of September 11, 2001, and the anthrax attacks that followed on disaster preparedness and health policy in the United States. Garrett argues that "all our readiness response depends on well-funded police, well-funded fire departments, well-funded hospitals, well-funded public health infrastructures, and precisely the opposite is where we are going right now." Garrett cautions that U.S. preparedness for a major terrorist attack may be decreasing. "As budgets are being cut at the federal level, the state level, and the local level, we're actually less ready than we were in 2001," Garrett says.