Air traffic controllers handling flights approaching and departing Newark Liberty International Airport experienced another outage early Friday morning. The blackout included losing radar for about 90 seconds at 3:55 a.m. local time, the Federal Aviation ...

“I equate a good, A-level, traffic controller that can handle a place like Newark, JFK, LAX, San Francisco, to a three dimensional chess player who can juggle a chainsaw, an axe, a sword, a razor blade with his eyes closed,” Aero Consulting Experts CEO and a former United pilot Ross Aimer told Fortune.

The Federal Aviation Administration recently announced a three-year plan to upgrade air traffic control systems nationwide.

A reporter asked Duffy on Monday why the first Trump administration chose not to address the air traffic control system during his first term in office, noting that Duffy said it was a “decades-old” problem. However, Duffy’s answer left many users on social media scratching their heads.

The United States aviation industry continues to grapple with the worst air traffic controller shortage in nearly 30 years as a recent spate of incidents has thrust the high-stress profession into the spotlight.

One air traffic controller (ATC) and a trainee will operate every flight in and out of Newark between 6.30pm-9.30pm — despite 15 staffers being the standard requirement for a shift.

There is more bad news for Newark Liberty International Airport. The FAA wants to keep reducing flights at the troubled airport for months to come.