YORK, Pa. — The Federal Aviation Administration will reduce air traffic by 10% at 40 busy airports beginning Friday , citing growing fatigue among air traffic controllers who have worked without pay since the government shutdown began Oct. 1.

Transportation Secretary Sean Duffy and FAA Administrator Bryan Bedford announced the cuts Wednesday afternoon, saying the move would affect roughly 3,500 to 4,000 flights daily.

The following airports will see up to 10% flight reductions beginning Friday, according to multiple reports. According to CBS News , ABC News , NBC News , The Associated Press and more outlets, this list could change as the FAA has not issued its final order.

Baltimore-Washington and Philadelphia International airports were included in the reports. Harrisburg

See Full Page