Should Newark Airport close until air traffic control upgrades are made? Experts and officials debate safety and the economic impact.

Over the past two weeks, several equipment outages at the Philadelphia-based air traffic control center that guides planes to and from Newark Liberty International Airport, have raised questions on just how safe it is to fly at one of the nation’s busiest airports.

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

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

The FAA said a telecommunications issue at the Philadelphia TRACON Area C facility, which guides aircraft in and out of Newark, caused the agency to issue a ground stop Sunday.