Terrorism & Violent Extremism

Counterterrorism

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Hungarian activists of the neo-Nazi Blood and Honour group hold flags in Budapest 11 February 2006 as participants bring wreaths at the tomb of Unknown Soldier in Heroes Square in Budapest where a German WWII helmet and wood cross were placed. More than 600 people attended the event to commemorate the 60th anniversary of the ill-fated escape attempt of Nazi German and Hungarian soldiers from Buda Castle, which was besieged 11 February 1945 by the Soviet Red Army at the end of World War II. (Photo by ATTILA KISBENEDEK/AFP via Getty Images)

State Dept’s Foreign Terrorist Designations Undermine Claims of “Antifa” Threat

Leading counter-extremism expert unpacks the administration's claimed designation of "Antifa Groups"
The Just Security Podcast Cover Image

The Just Security Podcast: Examining the Trump Administration’s New Antifa Designations

Tom Joscelyn talks with former DOJ counsel Tom Brzozowski about new Antifa designations, their civil liberties impact, and changing limits on speech and association.
An injured boy lays on his back in a van as two others attend to his wounds.

The Political Theater Behind Trump’s “Guns-a-Blazing” Nigeria Threat

Trump’s threat of military intervention in Nigeria may be intended more for domestic audiences and wouldn't address the drivers of the country's conflict.
U.S. President Donald Trump (C) speaks as (L-R) White House Deputy Chief of Staff Stephen Miller, White House Chief of Staff Susie Wiles, U.S. Attorney General Pam Bondi, U.S. Secretary of Homeland Security Kristi Noem and Federal Bureau of Investigation Director Kash Patel listen during a roundtable discussion in the State Dining Room of the White House on October 08, 2025 in Washington, DC. Trump’s administration held the roundtable to discuss the anti-fascist Antifa movement after signing an executive order designating it as a “domestic terrorist organization”. (Photo by Anna Moneymaker/Getty Images)

How Designating Antifa as a Foreign Terrorist Organization Could Threaten Civil Liberties

If the Trump administration designates Antifa as an FTO, it could have implications extending beyond anti-fascist activists to the entire architecture of U.S. civil society.
A police officer responds to a shooting at Evergreen High School on September 10, 2025 in Evergreen, Colorado. At least three students, including the suspected shooter, were injured in the attack. (Photo by Michael Ciaglo/Getty Images)

Correctly Assessing Left-Wing Terrorism and Political Violence in the United States

A recent published report risks feeding false narratives about political violence and polarization.
Right-wing white nationalists hold flags with signs like "white pride worldwide."

A New Approach in the Fight Against Transnational Violent Extremism is Needed

If the U.S. and foreign partners could strategically deploy their counterterrorism programs to deliberately target a common enemy, all would mutually benefit.

Children, Young People and the Emerging Terrorism Threat Landscape

Prevention efforts must shift toward a model that addresses the systemic drivers and underlying causes of youth vulnerability to violent extremism.

Book Release – Perpetual War and International Law: Enduring Legacies of the War on Terror

Introducing a new OUP book interrogating how precedents set in the post-9/11 era continue to shape contemporary conflicts.
Firefighters walk towards one of the tower at the World Trade Center before it collapsed after a plane hit the building September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)
People install obituaries for people killed in a terrorist attack

Regular ISIL-Threat Review at U.N. Shows U.S., Russia, China, and European Interests and Competition on Counterterrorism

An upcoming UNSC review is a good chance for States to reflect on what is needed in implementing the Council's counterterrorism work.
Demonstrators take part in a protest in front of the European Commission representation in Warsaw demanding more restrictive sanctions against Russia and arms supplies for Ukraine on January 8, 2024. (Photo by WOJTEK RADWANSKI/AFP via Getty Images)

It’s Time to Designate The Base as an FTO

With increasing violent extremism and waning DOJ interest in curbing far-right extremism, a failure to address the threats posed by The Base could prove fatal.
The Just Security Podcast

The Just Security Podcast: What Just Happened, The Budget Bill and the Future of DHS and ICE

Host David Aaron is joined by Steve Cash to discuss institutional constraints on the FBI and law enforcement agencies compared to DHS.
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