<Anchor> Last



night (the 11th) in our time, domestic flights were completely suspended across the United States.

It happened when the Federal Aviation Administration's computer network malfunctioned, and the US authorities said they were trying to figure out the cause.



Correspondent Seung-Mo Nam reports from Washington.



<Reporter> This



is Reagan Airport, one of the gateways to Washington, DC, the capital of the United States.



Passengers check for flight delays or cancellations in front of information boards.



[Mike/Aircraft Delayed Passenger: At first they said it would be delayed by 30 minutes, then after a while they said it would be delayed by 60 minutes, and then they said the flight would take off at 3:00 PM.]



The Federal Aviation Administration's computerized information system called 'Notam' The malfunction caused problems in aircraft operation.



The Federal Aviation Administration temporarily suspended all domestic flights, but returned them to normal at 9:00 am local time.



It is now a little over 1:00 PM local time, and although it has been 4 hours since flights resumed, as you can see, many flights are still delayed or canceled, causing disruptions to operations.



More than 20,000 flights across the United States were delayed, and more than 1,800 international flights to the United States were also affected, the Associated Press said.



The White House said there was no evidence of a cyberattack to date and that it had ordered a full investigation into the cause.



[Joe Biden/President of the United States: I just spoke with Secretary of Transportation Buttigieg.

The Department of Transportation also does not know what the cause is.

However, I spoke with the minister and told him to report it directly to me if he found out the cause.] While



it is pointed out that the FAA's outdated computer system may be the cause of the accident, it is likely related to cyber attacks by Russia, China, and North Korea. If confirmed, the possibility of a serious situation cannot be ruled out.



(Video coverage: Oh Jung-sik)