NOTAM
Nation wide air/ground stoppage

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https://twitter.com/FAANews/status/1613148579270459393?cxt=HHwWgoC81cCFh-MsAAAA

The FAA ✈️
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Update 3: The FAA is still working to fully restore the Notice to Air Missions system following an outage.

The FAA has ordered airlines to pause all domestic departures until 9 a.m. Eastern Time to allow the agency to validate the integrity of flight and safety information.
7:19 AM · Jan 11, 2023 •