The grounding of US flights is not a cyber attack, what is the problem?
The nationwide grounding, which lasted about four hours, resulted in the cancellation of nearly 10,000 flights, and officials ruled out the possibility of a cyber attack.
Quick Look
- Federal Aviation Administration lifted a nationwide grounding on Friday after nearly 10,000 flights were canceled and tens of thousands of passengers were stranded due to radar and communications system failures.
- Transport Minister Duffy said operations would gradually resume and officials had ruled out signs of a cyber attack.
AI-generated summary
Why It Matters
The failure exposed aging technology and personnel shortages in the U.S. air traffic control system. This is the second nationwide ground grounding in the United States since the 9/11 incident.
The U.S. Federal Aviation Administration (FAA) lifted the nationwide grounding order on Friday night (November 13).
However, U.S. Transportation Secretary Sean Duffy said flights can only resume gradually and it will still take time for airlines to resume normal operations. Analysts pointed out that the nationwide suspension, which lasted about four hours, may continue to disrupt flight arrangements in the coming days.
According to flight tracking website Flightradar24, nearly 10,000 flights were canceled that day. Among them, Delta Air Lines and American Airlines each had more than 2,200 flight cancellations. U.S. Transportation Secretary Duffy said tens of thousands of travelers were stranded at airports across the country.
According to flight tracking website FlightAware, more than 4,500 flights were canceled on Friday and about 700 flights were canceled on Saturday.
The failure once again exposed long-standing problems with the U.S. air traffic control system, including aging technology and equipment, communications failures and a shortage of thousands of air traffic controllers. Duffy said the glitches began Friday afternoon. At that time, the air traffic control center's radar and communications systems began to experience instability.
Officials rule out signs of cyber attack
U.S. Homeland Security Secretary Marin said there is currently no indication that the communication system failure is related to a cyber attack or artificial intelligence. He stressed that the safety of the public was never threatened. U.S. officials expect the aviation system to return to normal before Thanksgiving on November 26. The time around Thanksgiving coincides with the annual travel peak in the United States and is also one of the busiest periods for air passenger traffic throughout the year.
This is the second nationwide ground suspension in the United States since the 9/11 terrorist attacks. In January 2023, the FAA ordered all domestic flights to stop taking off due to a computer system failure, which lasted less than two hours.
What to Watch
AI outlook — possibilities, not facts
The aviation system will be back to normal before Thanksgiving, November 26
Likely · Within weeks
Open Questions
- What is the specific cause of the technical failure?
- How to solve the air traffic control personnel shortage problem?



