Speaking with ABC News' "This Week" co-anchor Martha Raddatz while a ground stop was in effect at Newark Liberty International Airport, Duffy said "We will delay, we will cancel, any kind of flight across the national airspace to make sure people are safe" amid the shortages.

ATC personnel are among the “excepted” federal employees working without pay while the government is shut down.

President Trump is the only person who can determine the winner of the space-oriented race to the Iron Throne.