The incident led to multiple employees being placed on trauma leave, resulting in hundreds of delayed or diverted flights.

More than a week of delays at Newark Liberty International Airport in New Jersey were caused after air traffic controllers lost communication with aircraft they were supposed to be controlling, and as a result took leave government employees use after experiencing traumatic situations.

Air traffic controllers lost contact with planes flying into Newark Liberty International Airport last week. A “fried piece of copper wire” may be to blame.