American Airlines has halted all flights across the United States due to a significant technical issue, prompting a nationwide ground stop as confirmed by the FAA. This outage, which notably affected operations on Christmas Eve, has caused widespread disruptions for thousands of holiday travelers. Delays and cancellations were reported, particularly from Fort Lauderdale-Hollywood International Airport, as passengers faced travel nightmares amid the technical difficulties. Flights resumed only after the ground stop was lifted, and the airline is working to resolve the ongoing issues.