Sean Duffy said the number of flight cutbacks would fluctuate by time of day with most targeting afternoon hours when international arrivals make the airport busier.

US Transportation Secretary Sean Duffy said he plans to reduce the number of flights at Newark Liberty International Airport over the "next several weeks." Duffy spoke to NBC News' "Meet the Press" Sunday morning,

The mounting air traffic control problems at Newark Liberty International Airport caused aviation officials to implement a ground stop for flights on Sunday morning, the third such incident in the past two weeks.