Updated at 8:08 p.m. ET
Flights in and out of Chicago's two airports came to a halt Friday morning after a fire at an air traffic control facility.
As of early Friday afternoon at least some of the flights had begun taking off and landing, reports NPR's David Schaper in Chicago.
The Associated Press says: "The fire started in the basement of the Chicago Air Route Traffic Control Center in Aurora, about 40 miles west of downtown Chicago, city of Aurora spokesman Dan Ferrelli said in an emailed statement."