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.

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.

Transportation Secretary Sean Duffy said Monday that “fast-track” fixes are being made to address the continuing communications and radar failures at Newark Liberty International Airport.

Transportation Secretary Sean Duffy says a new software update prevented a third radar outage over the last two weeks at New Jersey's busy Newark airport when a telecommunications line failed again over the weekend.

Sunday's incident marks the fourth time in the past two weeks that technical problems have disrupted air traffic at Newark.

As few as three air traffic controllers were working at Newark Liberty International Airport Monday evening, according to a published report. That’s 11 fewer than the targeted amount for that time period, The New York Times reported.

BDL received three flights following a communications blackout at Newark Liberty International Airport in New Jersey on April 28.