A veteran air traffic controller who was alone during the terrifying 90-second blackout at Newark Liberty International Airport refuses to fly out of the travel hub anymore — saying it’s “only a matter of time” before there’s a “fatal crash.

Air traffic controllers at Newark Liberty International Airport again lost contact with planes Monday, according to the FAA. It's the fourth such incident at that airport in less than a month and the latest in a string of alarming incidents and close calls at airports across the country.

Several times over the last year, Newark controllers lost radar or radio service, leaving them unable to talk with planes they were tracking.

Transportation Secretary Sean Duffy tells "CBS Mornings" it will take months to restore normal operations at Newark Liberty International Airport.

I don’t want to be responsible for killing 400 people,” air traffic controller Jonathan Stewart said in an interview with the Wall Street Journal