UPDATE: The ground stop has been lifted.
Police officials say the fire at the FAA facility in Aurora, Illinois, this morning was set intentionally. The fire led to a ground stop that affected hundreds of flights in and out of Chicago's O'Hare and Midway Airports.
In a press conference this morning, police said the fire appeared to have been set by a contracted employee in the basement of the facility, but it was not a terrorist act. Two men were found injured including a man with self inflicted wounds believed to be the suspect who started the fire. The incident is under investigation.
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