Listen to U.S. Permanent Representative to NATO Ivo Daalder discuss the Chicago NATO Summit with Foreign Affairs editor Gideon Rose and the Chicago Council on Global Affairs' Rachel Bronson.

The Chicago summit attempted to map a new NATO agenda, but instability in Afghanistan and the European fiscal crisis still cloud the alliance's path, says CFR's Charles Kupchan.

This declaration was issued at the NATO summit in Chicago, Illinois on May 20, 2012.

President Obama and NATO Secretary General Rasmussen gave these remarks on May 20, 2012 in Chicago, Illinois.

Republican presidential candidate Mitt Romney published this op-ed regarding NATO in the Chicago Tribune on May 19, 2012.

The upcoming NATO summit will include talks on the endgame in Afghanistan, a new smart defense doctrine, and bolstering global partnerships, all of it colored by fundamental questions about the role and mission of the alliance, says CFR's Stewart Patrick.

NATO has been the foundation of transatlantic security for more than sixty years, but despite its longevity, critics question whether the alliance can stay relevant in the face of emerging threats, limited funding, and debates over its mission.

Colonel Chad T. Manske, USAF, says the question of what constitutes missile-defense interim capability will loom large over the NATO Summit, but the issue for NATO remains whether they can muster the political, diplomatic, economic, and technical will to bring a ballistic-missile defense capability on line.

This Congressional Research Service report explains the issues to be covered at the upcoming NATO Summit in Chicago, where talks about Afghanistan, "smart defense," and partnerships with non-NATO members are supposed to dominate.

Charles A. Kupchan testifies before the Senate Committee on Foreign Relations on the future of the North Atlantic Treaty Organization (NATO), and what's at stake in the upcoming Chicago summit.

In advance of the mid-May NATO summit in Chicago, Ambassador Daalder discusses the alliance's priorities and future, as well as broader transatlantic relations.

Ahead of the mid-May NATO summit in Chicago, Ambassador Daalder discusses the alliance's priorities and future, as well as broader transatlantic relations.

In this Policy Outlook piece for the Carnegie Endowment for International Peace, NATO Deputy Assistant Secretary General for Emerging Security Challenges Jamie Shea discusses the role of NATO in times of austerity and how it can meet the challenges that lie ahead.

As U.S. and European leaders prepare for the NATO summit in May, CFR's Stewart M. Patrick and Chatham House Director Robin Niblett discuss why the alliance will remain important for Europe and the United States after NATO withdraws from Afghanistan.

U.S. Secretary of State Clinton and Defense Secretary Panetta gave these remarks on Afghanistan at a meeting at NATO headquarters on April 18, 2012.

In a post-conflict analysis of the air strike campaign in Libya, NATO finds numerous flaws in its system impairing its efficiency, including over-reliance on the United States, faulty coordination, and numerous civilian casualties, reports the New York Times.

CFR's James M. Lindsay remembers the signing of the North Atlantic Treaty in Washington, DC, on April 4, 1949, and discusses the difficulty inherent in pursuing fundamental changes to a nation's foreign policy.

Charles A. Kupchan argues that the Atlantic alliance is remarkably resilient, but it must now face the urgent challenge of economic and political weakness that has descended upon the West.

NATO's operation in Libya has rightly been hailed as a model intervention.

The Pentagon's plan for an end to U.S. combat operations in Afghanistan by the end of 2013 has drawn familiar battle lines in the public debate over the proper endgame for the war.