Silence. That’s the last thing an airline pilot wants to hear from air traffic control as they approach a major international airport straddling the country’s most populated city.

NEWARK, N.J. (AP) — Flight delays and cancellations persisted at Newark Liberty International Airport Monday, with Senate Minority Leader Chuck Schumer calling for an investigation into the “chaos” sparked by an air traffic controller shortage and thick cloud cover.

Major delays and cancellations out of Newark Liberty International Airport​ could continue if multiple issues, including staffing shortages and equipment malfunctions, aren't solved.