What to know about FAA cuts to flights in the U.S.:

The Federal Aviation Administration ordered airlines to cut thousands of flights across the U.S. starting Friday as the agency deals with shortages of air traffic controllers during the longest government shutdown in history.

Transportation Secretary Sean Duffy and FAA Administrator Bryan Bedford announced that the Trump administration would be cutting 10% of flights at 40 "high impact" airports throughout the country. Airlines expected to cut at least 4% of Friday's flights at those airports and ramp up to 10% next week.

Carriers scrambled to prepare for the cuts, with many waiving fees for flyers who want to change their plans or refund their tickets.

Some airlines have indicated they would reduce regional flights while

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