Transportation Secretary Sean Duffy said that air travel disruptions caused by the FAA's nationwide ground stop on Friday should resolve by the end of the day Monday at the latest. Speaking on a "Face the Nation" appearance on Sunday, Duffy said the disruptions should ease by "end of today, end of tomorrow" as airlines work to get flights and crews back on schedule. "As we look to the end of the day and into tomorrow, we should be running at full capacity," he said.

The chaos began Friday after an FAA system malfunction grounded flights across the country, leaving hundreds of thousands of passengers stranded and triggering widespread delays and cancellations. The ground stop forced more than 3,500 aircraft to land safely and led to thousands of flight cancellations and delays nationwide. Airlines have been scrambling to reposition aircraft and crews, and delays continued even after the ground stop was lifted.S2

Duffy offered new details on how a single fix spiraled into the nationwide stoppage, but when asked on Sunday, he could not guarantee that a similar air traffic meltdown would not happen again. Duffy said that "we're well on our way" to getting operations back on track, though the vulnerabilities that allowed the malfunction to cascade remain a concern. The story is developing, and further updates are expected.S1S2