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

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.

Newark Liberty International Airport is seeing continued delays as details emerge over an April 28 incident in which air traffic controllers in Philadelphia lost radar and communications with planes over Newark.