FAA grounds all flight within US immediately

The Federal Aviation Administration (FAA) has ordered that all flights in the United States be grounded until further notice, “due to extraordinary circumstances and for reasons of safety.”
The cause of the ground stop was not immediately clear, but it comes after frequency outages were reported in some parts of the country, CNN has reported.
“Traffic should remain ground stopped until further notice,” the FAA said in an advisory.
“International flights will be managed on a case-by-case basis.”
This is a breaking news story and will be updated.