New York Times Chief Washington Correspondant David Sanger interviewed Deputy Secretary of Defense Ash Carter during the Aspen Security Forum in Colorado, on July 18, 2013. They discussed military strategy transitioning from two wars, cybersecurity forces, sequestration, nuclear weapons, and intelligence leaks.

Max Boot reflects on the tenth-anniversary of the U.S. invasion of Iraq.

The answer is simple: 9/11. The most costly terrorist attack ever was carried out from Afghanistan. The United States showed bipartisan determination to bring the perpetrators to justice and—the part that explains our continuing engagement in Afghanistan—to prevent its soil from ever being used again to stage terrorist attacks.

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

Post-9/11 U.S. counterterrorism and surrounding civil liberties issues are unlikely to stray far from currently policy no matter who is in the White House in 2013, says CFR's Matthew Waxman.

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.

The 9/11 attacks on the United States catalyzed effective counterterrorism efforts worldwide and demonstrated the ongoing need for public resilience, says CFR President Richard Haass.

The war on terror may be over, but it's left behind a terrible human rights legacy--and Barack Obama has done very little about it, says James Traub, a fellow at the Center on International Cooperation.

Edward Alden and Liam Schwartz explain how a safe and simple visa process can help the U.S. tourism industry.

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.

Laurie Garrett discusses the tenth anniversary of the post-9/11 anthrax attacks and argues, ""If 9/11 marked the single most powerful moment of American unity since Pearl Harbor, the anthrax mailings ushered the opposite..."

Richard N. Haass says that the war in Afghanistan began ten years ago as a narrow, modest war of necessity but has evolved into a broad, ambitious war of choice.

Laurie Garrett discusses the tenth anniversary of the post-9/11 anthrax mailings.

It's tempting to see the 9/11 attacks as having fundamentally changed U.S. foreign policy. It's also wrong.

CFR's Stuart A. Levey discusses what the United States has learned in the ten years since the 9/11 terrorist attacks with students.

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.

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.