FAA System outage causes thousands of flight delays and cancellations across the US

Flight across united states have created chaos among thousands of passengers. 

Disrupted air travel in US early Wednesday Morning. 

The FAA is working to restore what is known as the Notice to Air Missions System. 

In an advisory, the FAA said its NOTAM (Notice to Air Missions) system had "failed". 

There was no immediate estimate for when it would be back, the website showed, though NOTAMs issued before the outage were still viewable. 

The agency said in a tweet that it was working on restoring its Notice to Air Missions System. 

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