Newark airport's been plagued with issues that have travelers like me concerned about safety. It's not dangerous, but delays are a bigger concern.

Several times over the last year, Newark controllers lost radar or radio service, leaving them unable to talk with planes they were tracking.

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

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

The air traffic control mishap early Friday morning added to disruptions in recent days that have intensified concerns about safety at one of the busiest U.S. airports.

With summer travel season approaching, the crisis at the New Jersey airport could mean weeks, if not months, of misery for travelers.

Newark Liberty International Airport is facing another FAA-imposed ground delay due to staffing shortages, after a telecommunications issue led to delays on Sunday.

Operations are returning to normal after a runway equipment issues prompted ground stops at Newark Liberty and Hartsfield-Jackson Atlanta International airports Sunday, the Federal Aviation Administration announced.