On the night of November 14, flights from all airports in the United States were suspended due to communication problems.
The massive outage was caused by problems with network routers and software updates. The US Department of Homeland Security and the FBI said they saw no signs of a cyber attack, terrorist threat or deliberate interference.
The US Secretary of Transportation is already demanding $50 billion to modernize the aviation system after a massive failure.
This is the second time in history that flights have been completely disabled in the United States since attacks on September 11, 2001. According to the FlightAware service, more than 4,700 flights were canceled and about 10,000 were delayed. Currently, air connections are gradually being restored.