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,

According to the FAA, all prospective air traffic controllers "must have the capacity to perform the essential functions of these positions without risk to themselves or others. Candidates must be physically and mentally fit and meet standards for vision, hearing, cardiovascular, neurological and psychiatric health."