A severed Verizon cable caused chaos in U.S. air traffic on Monday, leading to the cancellation or delay of hundreds of flights across the country. The incident, caused by construction contractors in New Jersey , once again highlighted how fragile the infrastructure that supports air traffic control in the United States is.
According to FAA Administrator Bryan Bedford , the chain of events began with a circuit failure that led to the discovery of the severed fiber optic cable. The failure had an immediate impact on operations at all three airports New York major — JFK , LaGuardia and Newark — with ground stops imposed .
Verizon issued a statement to CNBC denying any responsibility for the incident, blaming “ construction contractors working in the area ” who “ dug and cut our cable .” The telecommunications company stressed that it bears “ no responsibility for this incident ,” while also confirming that the cable was repaired that same evening.
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Verizon cable cut: Who's to blame for flight chaos?
The issue of liability proved to be as complex as the technical problem itself. U.S. Transportation SecretarySean Duffyinitially said that an Amtrak accidentally cut the cable. However, Amtrak quickly responded by blaming New Jersey Transit. “This incident occurred on New Jersey Transit property and involved a New Jersey Transit contractor,” an Amtrak spokesperson told NBC4. The blame game between the agencies involved highlighted the coordination problems that exist between public and private infrastructure in the United States.
This is not an isolated incident. In the United States, thousands of kilometers of fiber optic cables run underground, often without adequate signage or notification to contractors who dig them. This phenomenon, known as “dig-in,”is one of the most common reasons for telecommunications infrastructure outages worldwide. According to industry estimates, such damage to underground cables accounts for a significant percentage of network outages each year.
The most disturbing aspect of the case is that a single fiber optic cable had the potential to paralyze air traffic control at three of the nation's busiest airports. This raises serious questions about the resilience and redundancy of the communications systems the FAA uses to control air traffic.
Cut cable and aviation security: What the incident reveals
Air traffic control relies on complex communication systems that include voice communications , radar data, ATIS (Automatic Terminal Information Service) systems , and more. Fiber optic cables form the backbone of this infrastructure, carrying vast amounts of data at the speed of light. When such a cable is cut, the results can be immediate and devastating for businesses.
In this case, the FAA was forced to impose ground stops — a process in which planes are not allowed to depart from their originating airports for specific destinations. This creates cascading delays that affect dozens of airports across the country, as planes are unable to follow their scheduled routes. According to data from FlightAware, flight cancellations in the US exceeded 1,000 for that day alone.
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On Monday night, Minister Sean Duffy announced that “telecommunication lines have been repaired and all air operations on the North East Coast are continuing,” but warned that it would take “some time to resolve all existing delays.” Experience shows that even after such a fault is repaired, the impact on the air network can last for hours or even days.
Cut the Wire: Lessons for the Resilience of Critical Infrastructure
This incident highlights a fundamental weakness in critical infrastructure design: overreliance on single pointsof. In the world of cybersecurity and infrastructure management, the principle of redundancy is fundamental — every critical system must have alternate paths and backup systems that can automatically take over in the event of a failure.
In the FAA’s case, the question is why a single cable cut could cause such widespread disruption. Experts point out that while backup systems exist, their activation is not always automatic or immediate, and switching to alternative systems can take time and human intervention. In addition, the geographic concentration of infrastructure in specific areas increases the risk of widespread outages from localized incidents.
Similar incidents have occurred in the past, both in the US and internationally. In 2023, severed undersea communications cables in the Baltic Sea raised concerns about deliberate sabotage, highlighting the strategic importance of cable infrastructure. In the US, the FAA faced a similar problem in January 2023, when a failure in the NOTAM (Notice to Air Missions) system caused the suspension of all flights in the country for several hours.
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For passengers affected by yesterday's incident, airlines have announced flexible rebooking policies. However, the experience of waiting at airports for hours without a clear update on the situation is a reminder of how important timely and transparent communication from authorities is in such situations. According to The Verge, despite the cable being restored, delays continued for several hours after the incident.
