An Associated Press article on PBS explains what passengers should know after a nationwide U.S. ground stop on Friday, 13 November 2026, left 12,000 scheduled flights grounded when officials could not quickly find the cause of a system overload, and says the stoppage ended around 8:15 p.m. ET. Officials, including Transportation Secretary Sean Duffy, attributed the overload to contractor work replacing copper wire with fiber and said it was not a cyberattack; passengers are owed rebooking or refunds, and up to 5,000 of Saturday's 41,000 flights could be canceled before a full recovery expected Sunday.