House Homeland Security subcommittee examines online radicalization, generative AI and platform moderation after New Orleans attack

The House Homeland Security Subcommittee on Counterterrorism and Intelligence opened its first hearing of the 119th Congress to examine how foreign terrorist organizations and other violent extremists use the internet, encrypted messaging apps, cryptocurrency and generative artificial intelligence to recruit, radicalize and mobilize individuals to violence.

Chairman Pflueger, presiding at the hearing, said the panel’s purpose was “to identify how foreign terrorist organizations like ISIS and other nefarious actors use the Internet, online networks, and generative AI to recruit and radicalize individuals to commit violence and terrorist acts.” He opened the session by citing the New Orleans New Year’s Day attack, noting investigators believe the perpetrator “self radicalized online through various propaganda channels affiliated with ISIS.”

The hearing brought four outside experts: David Gartenstein-Ross, senior advisor on asymmetric warfare at the Foundation for Defense of Democracies and founder/CEO of Valens Global; Aaron Zelin, senior research fellow at The Washington Institute and director of the Islamic State Worldwide Activity Map project; Daniel Flesch, senior policy analyst for the Middle East and North Africa at The Heritage Foundation; and Kurt Braddock, assistant professor of public communication at American University. Each summarized research and recommendations for policy responses.

Why it matters: witnesses and members said online radicalization is a persistent, evolving national-security threat that now includes new tools such as generative AI. The hearing focused on operational examples, current gaps in platform enforcement and potential congressional steps to ensure law enforcement and platforms can keep pace.

Key testimony and evidence

- Gartenstein-Ross argued extremists are…