About

The Transatlantic Security Initiative’s mission is to contribute to a strong and resilient transatlantic relationship that is prepared to deter and defend, succeed in strategic competition, and harness emerging capabilities to address future threats and opportunities. This mission endures across changing political dynamics on both sides of the Atlantic and in the face of new and evolving threats.

TSI advances the interests and values of the United States and its transatlantic allies and partners through the Atlantic Council’s convening power, our cutting-edge research and substantive expertise, and through our extensive and influential network across the transatlantic community. We work in partnership with governments, the private sector, think tank community, academia and others. We hold expert public and private convenings, conduct research, organize study trips, and produce publications, commentary and analysis to shape and influence policy and debate on the biggest challenges facing the transatlantic relationship. Intellectual independence is a cornerstone of our work at all times.

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NATO programming

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Expert commentary & analysis

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The Scowcroft Center for Strategy and Security works to develop sustainable, nonpartisan strategies to address the most important security challenges facing the United States and the world.

Content

In the News

Jun 25, 2025

Taussig quoted in Financial Times on Trump’s comments aboard Air Force One

By Torrey Taussig

On June 25, Transatlantic Security Initiative director and senior fellow Torrey Taussig was quoted in Financial Times on reactions from NATO allied officials after President Trump commented that Washington’s commitment to Article 5 “depends on your definition.”

Europe & Eurasia
NATO

In the News

Jun 25, 2025

Taussig quoted in POLITICO on lessons from the NATO Summit

By Torrey Taussig

On June 25, Transatlantic Security Initiative director and senior fellow Torrey Taussig was quoted in POLITICO arguing that the 2025 NATO Summit in the Hague was “a moderate success.”

Europe & Eurasia
NATO

In the News

Jun 25, 2025

Taussig quoted in New York Times on the NATO Summit Agenda

By Torrey Taussig

On June 25, Transatlantic Security Initiative director and senior fellow Torrey Taussig was quoted in the New York Times on Ukraine’s omission from the NATO Summit agenda.

Europe & Eurasia
NATO

New Atlanticist

Jun 23, 2025

Expect NATO’s new spending pledge to be overshadowed by weakening US commitment and inaction on Ukraine

By Ian Brzezinski, Ryan Arick

The Hague summit will ultimately be defined by what the US president communicates about his commitment to transatlantic security and what NATO allies do to support Ukraine.

Defense Policy
NATO

In the News

Jun 23, 2025

Deni and Arick in Stars and Stripes on NATO’s defense investment pledge

By Ryan Arick, John R. Deni

On June 23, Transatlantic Security Initiative nonresident senior fellow John Deni and associate director Ryan Arick were quoted in Stars and Stripes on NATO’s new defense investment pledge and how the Alliance should consider new expenditures related to defense and security.

Trackers and Data Visualizations

Jun 20, 2025

NATO Defense Spending Tracker

By Kristen Taylor

The Transatlantic Security Initiative's NATO defense spending tracker delves into data and figures to analyze current defense spending trends.

Europe & Eurasia
NATO

New Atlanticist

Jun 20, 2025

What counts as ‘defense’ in NATO’s potential 5 percent spending goal?

By John R. Deni, Ryan Arick

The Alliance must ensure that “defense related” items truly contribute to collective defense as it plans its new, larger spending goal.

Defense Policy
Europe & Eurasia

Issue Brief

Jun 5, 2025

Immediate steps that Europe can take to enhance its role in NATO defense

By Franklin D. Kramer, Kristen Taylor

As NATO members gather in the Hague amid uncertainty about US commitment to the continent and concerns about Russia’s military rebuilding, what can European nations do to deter and, if necessary, defeat threats from Moscow?

Europe & Eurasia
NATO

New Atlanticist

Jun 5, 2025

What explains the transatlantic rift? It’s all about threat perception.

By Jason Davidson

NATO allies’ differing threat perceptions provide the backdrop for what could be a contentious summit in The Hague this month.

Defense Industry
Defense Policy

Issue Brief

Jun 5, 2025

The world needs a maritime ‘elite league’ to combat rogue shipping

By Elisabeth Braw

Geopolitical tensions are undermining the mostly apolitical system that has regulated shipping since the 1950s, but hazards remain on the high seas. Countries interested in curtailing the rise of shadow vessels and the associated risks of accidents and environmental damage should band together to keep their waters places where the highest standards apply.

Economy & Business
International Organizations