Goa, Nov. 14 -- The United States has lifted a nationwide flight shutdown following a communications failure at air traffic control centres that caused widespread disruption at airports across the country.

The disruption resulted in more than 4,700 flight cancellations and around 10,000 delays on Friday, while approximately 700 flights were also cancelled on Saturday.

The shutdown was attributed to outdated air traffic control systems, which have reportedly not been upgraded due to a lack of funding from Congress.

The incident highlighted concerns over the condition of the country's ageing aviation infrastructure and its ability to handle air traffic safely and efficiently.

With the nationwide restrictions lifted, flight operations ar...