* The FAA's NOTAM system - which pilots use to see flight plans - failed overnight
* The White House says there is 'no evidence' of a cyber attack
* The issue was fixed by 9am but more than 7,000 flights were delayed as a result
All flights across America were grounded today for the first time since 9/11 after an as-yet unexplained, FAA computer system failure.
The first complaints by passengers that their flights had been grounded started at around 4am EST, but it wasn't until 6.30am that the FAA announced it had grounded all flights as a result of an overnight crash of its NOTAM system - which pilots use to receive hazard warnings and safety updates.
By 9am, the issue had been resolved and flights were beginning to take off again.
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Update #1: Flight disruptions cascade across US after computer outage (AP)
Update #2: U.S. airports rumble back to life after FAA computer outage, article with gallery (Reuters)
WNU Editor: The FBI sees no evidence of a cyber attack.