Failure of the US air traffic control system: what is known?
The US Federal Aviation Administration (FAA) has issued a nationwide ban on all aircraft departures, citing "exceptional circumstances and safety concerns".
The restrictions lasted for four hours and affected about 15 thousand planes.
The cause was a failure in the air traffic control system, which occurred due to an attempt to modernize outdated infrastructure, said Transport Minister Sean Duffy.
According to the New York Times, the failure occurred just days after the FAA announced it would begin rolling out an artificial intelligence-based tool to help air traffic controllers prevent flight delays.
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