The Federal Aviation Administration ’s unprecedented order to scale back flights nationwide because of the record-long government shutdown took effect Friday morning, with some passengers trying to figure out backup travel plans.

Airlines scrambled to adjust their schedules and began canceling flights Thursday in anticipation of the FAA’s official order, while travelers with plans for the weekend and beyond waited nervously to learn if their flights would take off as scheduled. Airlines also planned cancellations into the weekend, directing passengers to check apps to learn their flight status .

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