Federal agencies including the FBI and the Department of Homeland Security (DHS) have issued warnings about potential lone wolf terrorist attacks targeting Independence Day celebrations in the United States. The threat is considered particularly acute in major cities such as New York and San Francisco. U.S. State Department spokesperson Tammy Bruce highlighted concerns over possible Iranian terror attacks during the July 4 festivities, noting that individuals who crossed the border during the Biden administration represent an ongoing national security risk. Officials emphasize vigilance as Americans prepare for the holiday, with federal authorities identifying lone wolf attackers—both foreign and domestic extremists—as the primary security concern for public safety during the celebrations.