A Call to Action on Nuclear Terrorism

Add your voice and join the effort to prevent nuclear terrorism.


This week, global leaders gather for a final Nuclear Security Summit to take action to prevent terrorists from building and detonating a nuclear bomb. This requires securing and reducing nuclear bomb-making materials—plutonium and highly enriched uranium—around the world. Since the Summits began, 11 countries have eliminated nuclear weapons materials entirely. This is important progress, but the job is not done.  The Summits are ending as the global terrorist threat is growing.  

We call on leaders to accelerate the effort to prevent catastrophic nuclear terrorism and continue their work beyond this last Summit to create global standards, accountability and best practices for securing all nuclear materials.

The United States and Russia, with the vast majority of the world’s nuclear materials and weapons, have a special responsibility to lead. The relationship between the U.S. and Russia has dangerously deteriorated, raising the risk of conflict instead of cooperation. We call upon the two countries to work to prevent ISIS and other violent groups from getting these materials and to avoid another costly arms race.

There is no greater threat to humanity and to the promise of our children's future than the nuclear threat. Our leaders must reverse our march down this risky path. 

All nations must act to prevent nuclear terrorism and a new arms race. 


More than 900 people from around the world with backgrounds from community leaders, to clergy, to world leaders signed our letter online. Thank you for making this effort possible, and showing world leaders this is an issue that matters, no matter where you are from.

See the full list of signers.

Share #NoGreaterThreat and Encourage Others to Join!

Invite your friends to tell world leaders to continue the urgent work to prevent nuclear terrorism. This threat will not end when the Nuclear Security Summit closes on April 1, and we expect their efforts to continue.


We are grateful to the Carnegie Corporation of New York for supporting this initiative.

Nuclear Threat Initiative                       Carnegie Corporation of New York
Hassan Abbas,

Professor, National Defense University

Riaz Muhammad Khan,

former Foreign Secretary of Pakistan


James M. Acton,

Carnegie Endowment for International Peace

Anton V. Khlopkov,

Director, Center for Energy and Security Studies (CENESS)


David Albright,

Institute for Science and International Security

Daryl G. Kimball,

Executive Director, Arms Control Association


Amb. Hamad Alkaabi,

Permanent Representative of the UAE to the IAEA

Jeong H. Kim,

Chairman, Kiswe Mobile; President Emeritus, Bell Labs

Graham Allison,

Kennedy School of Government, Harvard University

Henry A. Kissinger,

former U.S. Secretary of State

Kofi A. Annan ,

Daniel Lipman,

Nuclear Energy Institute

Alexey Arbatov,

IMEMO, Russian Academy of Sciences, former member of the Russian Parliament

Pierre Lellouche,

former French Minister, Deputy of Paris, Les Republicains Spokesman for Foreign Affairs

Irma Arguello,

CEO- NPSGlobal Foundation; Head of Secretariat, Latin American and Caribbean Leadership Network

Ruud Lubbers,

former Prime Minister of the Netherlands, 1982-1994

Oscar Arias,

former President of Costa Rica and Nobel Peace laureate

Richard G. Lugar,

United States Senator (Ret.); President, The Lugar Center

James A. Baker, III,

61st U.S. Secretary of State & 67th U.S. Secretary of the Treasury

Allison Macfarlane,

former Chairman, Nuclear Regulatory Commission; George Washington University

Dame Margaret Mary Beckett,


Col-Gen. (ret.) Evgeny P. Maslin,


John H. Bernhard,

Former Ambassador of Denmark to the IAEA, Senior Associate, Partnership for Global Security

Jessica T. Mathews,

Distinguished Fellow, Carnegie Endowment for International Peace

Hans Blix,

European Leadership Network, former Director General of the International Atomic Energy

Jack F. Matlock, Jr.,

Rubenstein Fellow, Duke University; U.S. Ambassador to USSR, 1997-2001

Michael R. Bloomberg,

108th Mayor of the City of New York

Jeffrey D. McCausland,

PhD, Colonel, US Army (retired), former Dean, United States Army War College

Kjell Magne Bondevik,

former Prime Minister of Norway; President, Oslocenter

General (Retd) Sir John McColl,

former NATO Deputy Supreme Allied Commander Europe

Charles A. Bowsher,

former Asst. Sec. of the Navy, former U.S. Comptroller General

Michael McFaul,

Stanford University

Larry Brillant ,

Chair, Skoll Global Threats Fund

Robert C. McFarlane,

former National Security Advisor

Edmund G. Brown Jr.,

Governor of California

Chung-in Moon, Co-Convenor,

Asia-Pacific Leadership Network; Yonsei University; Global Asia

Des Browne,

former Secretary of State for Defence, United Kingdom

Admiral Mike Mullen, USN (Ret),

former Chairman of the Joint Chiefs

Gro Harlem Brundtland,

former Prime Minister of Norway

Nathan Myhrvold,

Founder and CEO of Intellectual Ventures

Zbigniew Brzezinski,

former National Security Advisor

Steve Nesbit,

American Nuclear Society (Public Policy Committee Chairman)

Warren E. Buffett,

Chairman and CEO, Berkshire Hathaway Inc.

Anita Nilsson,

AN & Associates; former Director of Nuclear Security at the IAEA

Ambassador William J. Burns,

President, Carnegie Endowment for International Peace; former U.S. Deputy Secretary of State

Sam Nunn,

Co-Chairman and CEO, Nuclear Threat Initiative

John R. Beyrle,

former US Ambassador to Russia and Bulgaria

Ron Olson,

Partner, Munger, Tolles & Olson, LLP

Michelle Cann,

Partnership for Global Security

Paul S. Otellini,

Member, Nuclear Threat Initiative Board of Directors

Gen J. E. Cartwright (Ret)

Richard D. Parsons,

Senior Adviser, Providence Equity Partners

Jimmy Carter,

former President of the United States

William J. Perry,

former U.S. Secretary of Defense

General (ret) Patrick Charaix,

former Commander of Strategic Air Forces, France'

Michael A. Peterson,

President & CEO, Peter G. Peterson Foundation

Kenneth I. Chenault,

Chairman & CEO American Express Company

Peter G. Peterson,

Founder and Chairman, Peter G. Peterson Foundation

Daniel W. Christman,

LTG (Ret), USA, former Assistant to the Chairman, JCS

David H. Petraeus,

Member, KKR & Chairman, KKR Global Institute

Joseph Cirincione,

President, Ploughshares Fund

Thomas R Pickering,

former Under Secretary of State and Ambassador

Tom Z. Collina,

Ploughshares Fund

Miles Pomper,

James Martin Center for Nonproliferation Studies

Liru Cui,

Member Foreign Affairs Committee of the National Committee, Chinese People's Political Consultative Conference (CPPCC)

Dr. William C. Potter,

Director, James Martin Center for Nonproliferation Studies

Charles B. Curtis,

President Emeritus, Nuclear Threat Initiative

Stuart J. Rabin, Chairman of the Board,

Decision Sciences International Corporation

Massimo D'Alema,

FEPS President; former Prime Minister of Italy

Kingston Reif,

Arms Control Association

Kelsey Davenport,

Director for Nonproliferation Policy, Arms Control Association

Malcolm Rifkind,

former Foreign Minister of the United Kingdom

Pete V. Domenici,

United States Senator (Ret.)

Lord George Robertson,

former NATO Sec. Gen. and UK Defence Secretary

Michael Douglas,

Actor, Producer

David Rockefeller Jr.,

Chair, The Rockefeller Foundation

Sidney D. Drell,


2013 recipient, National Medal of Science

Joan Rohlfing,

President, Nuclear Threat Initiative

Vladimir Dvorkin,

Major-General (ret.), RAS and Carnegie Moscow Center

Naeem Salik, PhD,

Centre for International Strategic Studies (CISS)

Susan Eisenhower,

The Eisenhower Group, Inc.

Gary Samore,

Executive Director for Research, Belfer Center for Science and International Affairs, Harvard Kennedy School

Rolf Ekeus,

Stockholm International Peace Research Institute, SIPRI

Lieutenant General (retd) John Sanderson,

former Chief of the Australian Army; former Governor of Western Australia,

Julian Enoizi,

Pool Reinsurance Company Ltd

Rear-admiral(Ret) Camille Sellier,

former policy advisor CEA/DAM

Victor Esin,

Colonel General (ret.); Leading Research Fellow, Institute for the US and Canadian Studies, Russian Academy of Sciences

Andrew K. Semmel,

former Deputy Assistant Secretary of State for Nuclear Nonproliferation

Gareth Evans,

former Foreign Minister of Australia; Co-Chair, International Commission on Nuclear Non-Proliferation and Disarmament

Amartya Sen,

Lamont University Professor, Harvard University

Charles D. Ferguson,

President, Federation of American Scientists

Stephen A. Schwarzman,

Chairman, CEO and Co-Founder, The Blackstone Group

Marvin Fertel,

President and CEO , Nuclear Energy Institute

George P. Shultz,

former U.S. Secretary of State

Gideon Frank,

former Director General of Israel Atomic Energy Commission

Elena K. Sokova,

James Martin Center for Nonproliferation Studies

Soren Gade, MP,

former Minister of Defense, Denmark

Sharon Squassoni

Rick Gerson,

Chairman and CIO, Falcon Edge Capital

Julia Stasch,

President, John D. and Catherine T. MacArthur Foundation

General Peter Gration,

former Chief of Defence Force, Australia

Admiral James Stavridis, USN (Ret),

Dean, The Fletcher School at Tufts University, Supreme Allied Commander at NATO 2009-2013

Jamie S. Gorelick,

former Deputy Attorney General and former General Counsel of the Department of Defense

Han Sung-Joo,

former ROK Minister of Foreign Affairs'

Vartan Gregorian,

Carnegie Corporation of New York

Dr. Tatsujiro Suzuki,

Research Center for Nuclear Weapons Abolition, Nagasaki University

Eugene E. Habiger,

General USAF (Ret), former Commander in Chief, US Strategic Command

Hon. Ellen Tauscher,

former UnderSecretary of State for Arms Control and International Security

David Hamburg,

Advisor to the Nuclear Threat Initiative, President Emeritus, Carnegie Corporation

Aso O. Tavitian,

President, Tavitian Foundation, Inc.

Lee H. Hamilton

Ramesh Thakur,

Australian University ; former UN Assistant Secretary-General

Dr. John Hamre,

former Deputy Secretary of Defense

John Tierney,

former Member of Congress; Executive Director, Council for a Livable World

David Harding,

Founder & CEO, Winton Capital Management Ltd

General John H. Tilelli Jr. (USA, Ret.)

HRH Prince El Hassan bin Talal,

Chairman of the Arab Thought Forum

Alexandra I. Toma

Ambassador Carla A. Hills,

Chair & CEO of Hills & Company, International Consultants

Vyacheslav I.Trubnikov,

Ambassador Extraordinary and Plenipotentiary of Russian Federation, General of the Army (ret)

Siegfried S. Hecker,

Director Emeritus, Los Alamos National Laboratory

Assoc. Prof. Dr. Ta Minh Tuan,

Vietnam Fatherland Front

Stephen Heintz,

President, Rockefeller Brothers Fund

Ted Turner,

Co-Chairman, Nuclear Threat Initiative

Dr. Roger Howsley,

Executive Director, World Institute for Nuclear Security

Frank N. von Hippel,

Princeton University

Jon M. Huntsman, Jr.,

Chairman, Atlantic Council; Co-Chair, No Labels; former Governor of Utah

Paul F. Walker,

Ph.D., Green Cross International

Jay Inslee,

Governor, State of Washington

Honorable Andy Weber,

former U.S. Assistant Secretary of Defense

John Isaacs,

Council for a Livable World

Prof Sir Mark Welland,

Former Chief Scientific Adviser, Ministry of Defence, UK

Wolfgang Ischinger,

Chairman, Munich Security Conference

Admiral the Rt Hon Lord West of Spithead GCB DSC PC,

former First Sea Lord and Security Minister

Igor Ivanov,

President Russian International Affairs Council, Minister of Foreign Affairs of Russian Federation (1998-2004)

Right Honourable Shirley Williams,

former Leader Liberal Democrats House of Lords

James L. Jones,

General (Ret)

Steve Wynn

Thomas L. Jones

Fujia Yang,

Academician, Chinese Academy of Sciences

Togzhan Kassenova,

Carnegie Endowment for International Peace

Hui Zhang,

Kennedy School of Government, Harvard University

Tom Kean,

former Governor of New Jersey

Pan Zhenqiang,

Senior Advisor, China Reform Forum

Dr. Ian Kearns,

co-Founder & Director, European Leadership Network

Ezra K. Zilkha,

President, Zilkha and Sons, Inc.

Brig ( Ret.) Feroz Hassan Khan,

Naval Postgraduate School, Monterey


Affiliation is for identification purposes only.

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About Nuclear Threat Initiative

The Nuclear Threat Initiative works to protect our lives, livelihoods, environment, and quality of life now and for future generations from the growing risk of catastrophic attacks with weapons of mass destruction and disruption (WMDD)—nuclear, biological, radiological, chemical, and cyber. Founded in 2001 by former U.S. Senator Sam Nunn and philanthropist Ted Turner, NTI is guided by a prestigious, international board of directors. Sam Nunn serves as chief executive officer; Des Browne is vice chair; and Joan Rohlfing serves as president.