FAA grounds flights nationwide
At 3:54 p.m. Eastern Time on November 13, the Federal Aviation Administration issued a nationwide ground stop at U.S. airports. Planes already in the air were allowed to land as usual, but no flights on the ground were allowed to take off.

Transportation Secretary Duffy said the communications failure affected all air route traffic control centers. According to flight-tracking website FlightAware, as of 5:40 p.m. Eastern Time that day, more than 1,100 flights had been canceled and nearly 10,000 delayed. The European aviation safety organization also suspended takeoffs that evening for flights from member countries to the United States.

The ground stop was lifted that evening after communications were restored. The FBI said there was no indication of a cyberattack, and a software update was one line of inquiry. U.S. stock markets are closed on Saturday, so airline stocks will have to wait until Monday.
Related codes: $AAL.US