Long lines, canceled flights at CLE

Driving the news: As of Friday morning, at least 15 flights through Hopkins had been canceled, all of them on routes serving airports on the FAA's list: Chicago O'Hare, Washington-Dulles, Detroit and New York-LaGuardia.

State of play: Passengers at Hopkins Friday morning were reporting TSA security lines longer than they'd seen in years, "trumping holiday travel," News 5 reports.

What they're saying: Frontier Airlines CEO Barry Biffle apologized for the scale of the disruption in an Instagram post Thursday.

• Given "the risk of flights cancelling I would suggest passengers buy a backup ticket on another carrier that departs after the first ticket," he wrote.

What's next: More cuts could follow if the FAA deems it necessary to ensure safety, potentially affecting Thanksgiving travel.

• "If the pressures continue to build even after we take these measures, we'll come back and take additional measures," FAA administrator Bryan Bedford said Wednesday.