The United States airports they cannot operate. Planes can neither take off nor land due to a computer failure of the system NOTAMthe application that alerts pilots of any risk on the route.
At the moment there is 770 flights they are experiencing delays. This could have a domino effect, since at this time intercontinental flights leave from Europe to the United States. From Aena they have confirmed to laSexta that the computer failure is not affected at Spanish airports.
For its part, the FAA has communicated on its Twitter account that it is working to restore its Air Mission Notification System. We are currently performing final validation checks and reloading the system.
Source: Lasexta

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