The FAA has grounded flights at several major Northeast airports due to significant disruptions caused by equipment outages and a fiber cable cut by a construction crew. Airports in Philadelphia, Newark, New York (JFK, LaGuardia), and Boston are experiencing widespread flight delays and cancellations as a result of these technical problems. A ground stop was initially issued for Philadelphia International Airport following major delays attributed to equipment issues, resulting in thousands of flights being snarled across the region. Despite some flights resuming, many continue to face delays as airports work to resolve the ongoing issues. Officials are investigating the cause of the technical failures, which are deeply impacting air travel across the Northeast.