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The US Federal Aviation Administration grounded all departing flights nationwide on Friday after a communications failure hit air traffic control centers, in only the second such shutdown since the September 11, 2001 attacks, Korea Times reports. The FAA said it is investigating the communications problem, according to Dong-A Ilbo, which notes the nationwide takeoff ban is rare for a non-terror emergency. Korean media are covering the event as a major disruption, with Dong-A Ilbo describing the situation as an 'all-stop' at airports across the US.