The long flight delays and cancellations plaguing Newark’s Liberty International Airport and spilling over to airports across the U.S. can be traced to a week ago when air traffic controllers temporarily lost communications with planes in the sky, according to the controllers union.

The union representing Air Traffic Controllers released new details about technology failures that disrupted flights at Newark's airport.

A system-wide outage last Monday caused air traffic controllers to lose the ability to see, hear or talk to all arriving and departing aircraft for 60 to 90 seconds at Newark Liberty Airport.