Moving air traffic controllers means retraining them on the quirks of a new facility, and the process can take years.

For the third time in two weeks, Newark Liberty International Airport air traffic controllers overseeing the busy New Jersey airport were temporarily unable to contact pilots.

The recent chronic delays and cancellations at New Jersey’s largest airport have highlighted the shortage of air traffic controllers and the aging equipment they use, which President Donald Trump's ad

Ground delays are expected to affect travelers at Newark Liberty International Airport on Thursday due to staffing shortages and runway construction, according to the FAA. Flights arriving at the airport are delayed up to 45 minutes,

FAA staffing shortages and runway construction are causing flight cancellations and delays at Newark Liberty International Airport in New Jersey on Friday.

United is Newark Airport‘s largest carrier. Cutting 35 flights means slashing about 10% of its daily agenda at the airport, where the airline flies an average of 328 flights a day. A spokesperson for the Port Authority of New York and New Jersey, which manages New Jersey’s airports, did not immediately respond to a request for comment.