Ask what Korea is talking about.

The US FAA grounded all departing flights nationwide on Friday, November 13, after a communications failure hit air traffic control centers—the longest nationwide halt since the September 11, 2001 attacks, lasting over four hours. Officials blamed a single router installed by contractor L3Harris, though the Wall Street Journal reported new network equipment in Arkansas and Texas sent excessive connection signals, overloading the control network. More than 20,000 flights were disrupted, with 15,000 cancellations; the FAA head predicted schedules would not normalize until late Sunday. Korean outlets highlighted the aging system, noting reliance on floppy disks, copper wires, and parts sourced from eBay, calling it a '20th-century FAA' and the worst disruption since 9/11. Sports schedules, including NBA and NHL games, were also affected. The FAA said there were no signs of a cyberattack.