The lack of just a dozen air traffic controllers has contributed to danger, chaos, and waves of delays and cancellations at Newark Liberty International Airport. Yet the Federal Aviation Administration — despite employing about 14,

Newark airport faces new delays due to FAA radar outages and staffing shortages, following a third system failure since late April.

Technology and staffing problems have plagued the airport, one of the nation’s busiest hubs. Officials say they are trying to resolve the issues, but concerns remain.