Gizmodo reports that the FAA issued a nationwide ground stop for all departing U.S. flights on 13 November 2026 "due to extraordinary circumstances and for reasons of safety," with Transportation Secretary Sean Duffy citing a communication issue affecting all Air Route Traffic Control Centers. Homeland Security Secretary Markwayne Mullin says there is no indication of a nefarious attack and that "it isn't a safety to the American people or another 9/11," while FlightAware showed at least 2,400 delays and 38 cancellations.