The air traffic system meltdown at Newark Liberty International Airport last week “was the most dangerous situation you could have,” according to an air traffic controller on duty that day, as the fallout from the outage stretches into a second week.

The Trump administration is promising to fix the nationwide shortage of air traffic controllers after recent control tower troubles on the East Coast and a string of crashes this year.

Audio between air traffic controllers and pilots at Newark Airport reveals the moment the tower lost radio contact with planes.