FAA explains cause of rare U.S. national ground stop after flight delays

The rare national ground stoppage has filled up airports since Friday afternoon. Officials are still working to get things back on schedule tonight and trying to explain what went wrong. Here's Alex Hogan. Chaos at airports across the country as passengers, airlines, and federal officials scramble to recover from Friday's national ground stop. As soon as we saw that our plane was unloaded, all the luggage, we're like, okay, well, you know, that's a dead giveaway. Thousands of flights were delayed or canceled Friday night into Saturday, with many people searching for alternate routes or a place to stay the night. We spent the night in the low chairs. My body hurts. We were thinking we were going to be on the sidewalk. It's only the third national ground stop in the U.S. and the longest since 9-11. The Trump administration has repeatedly said there are no signs of a cyber attack and there was no outage of air traffic control communications. Nothing went down. What we saw was instability, and we couldn't explain the instability. The Federal Aviation Administration says new technology added to the ATC system caused an overload of the outdated technology. Transportation Secretary Sean Duffy says that Congress needs to pass more funding so upgrades can be made immediately. I'm hoping that there'll be a unique coalition on the inside on the hill that meets the call. As for passengers hoping to finally make their destinations, several airlines have announced flexible waivers are in place for their customers. Officials say everyone set to fly will be compensated. Everyone will either be reaccommodated on a flight or they'll get a full refund. The FAA says it could take until Sunday night to fully recover from the ground stop. At the White House, Alex Hogan, Fox 10 News.