In the United States, flights resumed after a large-scale malfunction that led to the cancellation of more than 7,700 flights, according to CNN.
The day before, more than 7,700 flights were canceled and more than 8,000 were delayed due to communication problems. More than 2,000 flights were canceled on Saturday.
The cause of the failure is outdated traffic control systems and router problems.
Transportation Secretary Sean Duffy warned that without upgrades, similar incidents could happen again and called on Congress to provide funding.
This is the third nationwide suspension of flights in the US since attacks on September 11, 2001. In January 2023, the FAA also suspended all domestic flights for less than two hours.