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

Staff shortages and equipment failures at Newark Liberty International Airport have raised safety concerns in recent weeks.

Airline has trimmed its daily routes following technology and staffing issues affecting New Jersey hub.

The CEO of United Airlines maintains that New Jersey's Newark Airport is safe, despite construction, equipment failures and staffing issues that have resulted in delayed and canceled flights, NBC News' Marquise Francis reports.

Tech chaos at Newark Liberty airport saw a spike in cancellations and delays in recent weeks, disrupting one of the busiest airports in the United States.

By Rajesh Kumar Singh CHICAGO (Reuters) -United Airlines is facing a financial hit and potential long-term reputational harm as flight delays and cancellations pile up due to ongoing disruptions at Newark airport - one of its largest hubs and among the busiest in the country.