The United States experienced one of the most serious aviation disruptions in its modern history on Friday, 13 November 2026, when the Federal Aviation Administration ordered a nationwide ground stop. Departures were suspended at every US airport after communication failures affected several Air Route Traffic Control Centers responsible for managing aircraft between airports. The restrictions lasted more than four hours before being lifted at approximately 8:15 p.m. Eastern Time. Federal Aviation Administration
The consequences spread rapidly across the country. Hundreds of aircraft were diverted or returned to their departure airports, while thousands of flights were delayed or cancelled. Reuters reported that the number of cancellations approached 10,000 by late Friday evening. Aircraft, pilots and cabin crews were left far from their scheduled locations, meaning that disruption could continue for several days even after the airspace reopened. apnews.com
The scale of the shutdown immediately raised fears of a cyberattack. However, the Department of Homeland Security said investigators had found no evidence of malicious interference, hostile activity or an attack involving artificial intelligence. The National Security Agency was reportedly assisting with the investigation, and officials said that no possibility would be dismissed until the technical review had been completed. reuters.com
Preliminary findings instead point to a failure inside America’s ageing air-traffic-control infrastructure. Transportation Secretary Sean Duffy said old switches and routers became overloaded and began transmitting inconsistent radar and communications data. Because controllers could no longer rely on the information they were receiving, the FAA stopped departures as a safety measure while allowing aircraft already in the air to land under controlled conditions. ABC News
Officials are also investigating whether newly installed technology placed excessive pressure on older analogue equipment. Parts of the national network reportedly still depend on copper telecommunications lines and systems dating back several decades. The incident therefore appears less like a single computer malfunction and more like a warning about the vulnerability of critical infrastructure that has been modernised unevenly.
The immediate technical failure was corrected, but the wider problem remains. The US Transportation Secretary has requested $50 billion in emergency funding to modernise the air-traffic-control system and warned that similar outages could occur again without major investment. The investigation must now establish the precise sequence of failures, determine why backup systems did not prevent a nationwide shutdown and confirm conclusively whether any external interference played a role. ABC News




