Counterterrorism

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Collection: U.S. Lethal Strikes on Suspected Drug Traffickers

Collection of expert analysis on the legality of the U.S. strike on Venezuelan vessels in the Caribbean, the consequences of the strike, and related issues.
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.
Police maintain a presence outside a command center holding evacuated students following the lockdown of the school after a call of an active shooter on March 29, 2023 in Pittsburgh, Pennsylvania. Many schools, including Oakland Catholic and Pittsburgh Central Catholic, were targeted as part of what authorities are calling "computer-generated swatting calls." Many agencies, including state and municipal police, are conducting investigations. (Photo by Jeff Swensen/Getty Images)

Swatting Attacks and Nihilistic Violent Extremism: A Primer

Swatting attacks are sometimes dismissed as pranks or hoaxes. But they’ve wreaked havoc on college campuses this year and a network of extremists is behind many of them.

Assassinations in America: How Political Violence Became Personal

Americans can no longer turn to their political leadership to avert the catastrophe of political violence.

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.

The United States’ Dirty War on “Narco Terrorism”

By Professor Ben Saul, the Challis Chair of International Law at University of Sydney and United Nations Special Rapporteur.
US Marines' Lockheed Martin F35-B jets arrive in formation to José Aponte de la Torre Airport

Murder by Drone: The Legal and Moral Stakes of the Caribbean Strikes

If allowed to go unchecked, the Caribbean strikes could encourage additional unlawful executions by the United States and other leaders.
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