Placement on the U.S. "No Fly List," a subset of the Terrorist Screening Database managed by the FBI's Terrorist Screening Center, is based on specific, credible intelligence. A person is generally added to the list if they are suspected of having ties to terrorist activity or if they are deemed a threat to civil aviation or national security. The process typically involves a nomination by a federal agency (like the CIA or NSA) based on evidence such as participation in terrorist training camps, ties to extremist groups, or past threats. It is important to distinguish the actual "No Fly List" from "Selectee" status (which triggers extra screening) or "Redress" issues where a common name causes a false match. While the government does not officially disclose the criteria for inclusion to protect intelligence methods, individuals who believe they have been wrongly listed can apply through the DHS Traveler Redress Inquiry Program (DHS TRIP) for a review. In 2026, the list remains a controversial but central tool in global counter-terrorism efforts, monitored strictly by both U.S. and international aviation authorities.