Apple has revealed it has been targeted by computer hackers and will today release a software tool to protect customers against malicious software used in attacks.
The corporation says that there is "no evidence that any data left Apple" and that it is working with law enforcement personnel to identify hackers.
Facebook and other companies have also been targeted, according to Reuters.
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The outage struck Hartfield-Jackson Atlanta International Airport at around 1pm local time, stopping all outgoing flights.
It will be a chilly day for many parts with the highest temperatures, about 10 Celsius (50F) in the far northwest.
The social site has been overhauling many of its policies in recent weeks following repeated criticism over how it handles abusive content.