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

The problems that disrupted flights at New Jersey’s largest airport this spring could be repeated anywhere across the country, so Transportation Secretary Sean Duffy is trying to sell Congress on his plan to overhaul the nation’s air traffic control system that will cost “tens of billions.

But when bad weather strikes, or when other issues occur like the tech outages that have been plaguing Newark Liberty International Airport over the past month, air traffic controllers, already stretched thin by understaffing, can sometimes reach the breaking point.

Officials reported little to no significant delays at Newark Airport for Memorial Day weekend, a holiday that saw less air travel in the area overall.

Newark’s airport was again plagued by delays over Memorial Day weekend, with more than 150 flights in and 230 flights out delayed on Saturday, according to flight-tracking data.