More than 3,700 U.S. flights were delayed on Saturday due to air traffic controller shortages, and the country's airlines will have to cut hundreds more flights next week if Congress can't come to a solution to end the government shutdown — now the longest in U.S. history.

Trump administration officials this week ordered airlines to start cutting flights at 40 busy U.S. airports on Friday, blaming "increased reports of strain on the system from both pilots and air traffic controllers" in large part due to the shutdown.

Late Friday, Senate Republicans rejected a Democrat proposal to reopen the government.

Air traffic controllers, along with airport security screeners, are required to work during the shutdown without receiving their regular paychecks. Federal workers will mi

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