A massive telecommunications failure caused widespread travel chaos across the US on Monday, leading to thousands of flight delays and cancellations. The trouble began when a fiber-optic cable in New Jersey was accidentally severed by a construction crew, triggering a chain reaction that crippled air traffic control communications in the Northeast. The outage forced a hours-long ground stop for arrivals at major hubs, including New York’s three primary airports, Philadelphia, and Boston. The timing proved particularly difficult, as the disruption coincided with the arrival of numerous world leaders in New York for the United Nations General Assembly.

While officials scrambled to repair the severed line and a secondary circuit failure at a Philadelphia radar facility, the ripple effects left approximately 7,000 flights affected. Transportation Secretary Sean Duffy and FAA officials worked throughout the day to restore operations, eventually clearing the ground stops by late afternoon. The incident has reignited concerns regarding the reliability of America’s aging air traffic control infrastructure. Despite a $12.5 billion investment approved by Congress last year for system upgrades, officials suggest that further significant funding will be necessary to modernize the technology and prevent similar, potentially dangerous vulnerabilities in the future.