A massive communications failure halted flights to the US for four hours.
The Federal Aviation Administration has temporarily banned flights from all airports in the country due to problems with the communication system of air traffic controllers, Kazinform reports citing Reuters.
The restrictions were in effect for more than four hours. Planes that were in the air were allowed to land, but no new flights left. Analysts estimate that the disruption may affect about 11,000 flights and over 1.5 million passengers.
The cause was a problem with the FAA's antiquated communications network. The restrictions have already been lifted, but it will take time to fully restore air traffic.