Immigration and Customs Enforcement agents are using Mobile Fortify, a smartphone app with facial recognition technology, to photograph and scan the faces of people encountered during enforcement operations in Minneapolis, Chicago, Portland Maine, and other U.S. cities, including observers, activists, and bystanders. According to DHS documents, the agency may retain photos for 15 years with no opt-out option. The Illinois Attorney General alleges the app has been used over 100,000 times since its debut and violates Fourth Amendment privacy rights, while the ACLU of Minnesota filed a class action lawsuit claiming facial scans have become routine. Federal officials, including White House border czar Tom Homan, have indicated that people who protest or observe ICE operations may be placed on watchlists.