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Delta Air Lines

CEO Ed Bastian told CNBC that the carrier’s operation is running smoothly despite the federal government shutdown.

More than 13,000 U.S. flights were delayed this week, some of them due to shortages of air traffic controllers, raising concerns about strains on the country’s aviation industry during the shutdown.

Transportation Secretary Sean Duffy warned Monday that the FAA is seeing a “slight uptick” in sick calls of air traffic controllers.