US Heightens Security After Iran Airstrikes

After U.S. airstrikes on three Iranian nuclear sites, the Department of Homeland Security issued a National Terrorism Advisory, warning of a heightened threat environment in the U.S. through September 22, 2025. Officials highlight increased risks of low-level cyberattacks by pro-Iranian hacktivists, possible state-sponsored cyber activity, and a potential rise in violence or hate crimes, especially against Jewish and diplomatic sites. Major cities including New York, Los Angeles, and Nashville have ramped up police patrols and activated counterterrorism protocols around sensitive locations. Authorities caution that extremist violence risk could grow if Iran calls for retaliation, with antisemitic incidents being a particular concern. State and local leaders urge public vigilance, provide channels to report suspicious activity, and emphasize ongoing coordination with federal agencies. Despite the heightened caution, officials stress there are no specific or credible threats at this time.