Here's the latest on the NOTAM outage that caused flight delays and cancellations

https://www.npr.org/2023/01/12/ [login to see] /faa-notam-outage-ground-stop
Flights across the U.S. slowly resumed Wednesday after a nationwide ground stop by the Federal Aviation Administration, stemming from the outage of a crucial piece of technology.

The failure of the Notice to Air Missions system, or NOTAM, caused airlines to cancel more than 1,300 flights, and delay nearly 10,000 more, according to flight tracker FlightAware.com.

The FAA said that early investigative work traced the blackout to a "damaged database file," but the agency is still working to determine the root cause.

"At this time, there is no evidence of a cyberattack. The FAA is working diligently to further pinpoint the causes of this issue and take all needed steps to prevent this kind of disruption from happening again."