The Federal Aviation Administration issued an alert Friday stopping all US airports from allowing planes to take off.
In the alert, the FAA said it had ordered a nationwide ground stop on all departing flights “due to extraordinary circumstances and for reasons of safety.”
It said that “all departing traffic should remain ground stopped until further notice,” but did not give further explanation.
Transportation Secretary Sean Duffy said in a post on X that the stoppage was due to a communications issue.
Such an alert is highly unusual. One was issued after the Sept. 11, 2001, terrorist attacks.
This is a developing story and will be updated.




