We lead and integrate the national counterterrorism (CT) effort by fusing foreign and domestic CT information, providing terrorism analysis, sharing information with partners across the CT enterprise, and driving whole-of-government action to secure our national CT objectives.

The National Counterterrorism Center (NCTC) was established by Presidential Executive Order 13354 in August 2004, and codified by the Intelligence Reform and Terrorism Prevention Act of 2004 (IRTPA).

Sep 11, 2001 · The US National Counterterrorism Center (NCTC) is pleased to present the International Terrorism Guide Website, a ready reference guide for law enforcement, intelligence, military and security personnel, contingency planners, or citizens concerned about international terrorist threats.

The National Counterterrorism Center (NCTC) was established by Presidential Executive Order 13354 in August 2004, and codified by the Intelligence Reform and Terrorism Prevention Act of 2004 (IRTPA).

• Maintain the national repository of known and suspected terrorists. • Manage a Joint Operations Center to provide unique insight and situational awareness of developing terrorism-related worldwide issues and events.

Don M. Holstead has served as NCTC's Acting Director since January 2025, after joining NCTC as its Deputy Director in March 2024. Prior to that, he spent 20 years at FBI, most recently serving as Deputy Assistant Director of its Counterterrorism Division.

He has diverse counterterrorism experience against ISIS, al-Qa’ida, and Iran; has established and enhanced partnerships with State, Local, Tribal, and Territorial elements; and has managed processes to use bulk data to score the risk threat actors pose.

While there is no universally accepted transliteration of Arabic names and terms, this edition of the Counterterrorism Calendar adheres to a transliteration system that is generally used throughout the US Government. In this system, the letters “u” and “a” are preferred over “o” and “e.”

I am pleased to present this overview of the National Counterterrorism Center (NCTC), which describes our history, function, and impact. NCTC was borne out of a post-9/11 world in which the United States Government (USG) reorganized and restructured the Intelligence Community (IC) in order to protect and secure our nation from terrorist attacks.

Nineteen suicide attackers hijack and crash four US commercial jets—two into the World Trade Center in New York City, one into the Pentagon near Washington, DC, and one into a field in Shanksville—killing nearly 3,000 people.