The disruption was due to a “damaged database file”, the FAA said, adding that “at this time, there is no evidence of a cyber-attack “Flights began taking off again around 09:00 ET (14:00 GMT), though airlines have warned of further delays. Airports nationwide were affected, from Denver to Atlanta to New York City. As of Wednesday night, east coast time, nearly 10,000 flights in and out of the US had been delayed and more than 1,300 were cancelled. The technical issues marked the first time in nearly two decades that flights across the US were grounded. Operations have since resumed – but delays are expected to continue through at least Thursday and possibly longer, as airlines try to get planes in and out of crowded gates. Limits on how long staff can work may also have an impact.