What we know about the massive staffing shortage that has caused 7 days of major delays at Newark Airport

The shortage of certified air traffic controllers in the US has led to flight disruptions and headaches for travelers across the country, most recently at busy Newark Liberty International Airport in New Jersey, where staffing issues have led to major delays for an unparalleled seventh day in a row.

​ The shortage of certified air traffic controllers in the US has led to flight disruptions and headaches for travelers across the country, most recently at busy Newark Liberty International Airport in New Jersey, where staffing issues have led to major delays for an unparalleled seventh day in a row. Read More Breaking News, Latest News and Videos | CNN