Transportation Secretary Sean Duffy warned on Sunday that he's "concerned" about the whole airspace of the United States, citing old equipment being used by the Federal Aviation Administration.

Transportation Secretary Sean Duffy unveiled a sweeping plan to replace decades-old infrastructure to boost safety, cut delays, and support future air travel in a move to modernize the United States’s air traffic control system.

In an exclusive interview with Meet the Press, Transportation Secretary Sean Duffy says he’s concerned about the whole of U.S. airspace after recent outages at Newark Liberty International Airport.

US Transportation Secretary Sean Duffy said that Newark airport would see “several weeks” of reduced capacity as officials grapple with spiraling delays and safety lapses at one of the country’s busiest hubs.

Transportation Secretary Sean Duffy plans to reduce the number of flights in and out of the Newark Liberty International Airport for the “next several weeks,” as New Jersey’s largest airport struggles with radar outages and other issues,

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,