Police and firefighters are seen at the Chicago Terminal Radar Approach Control, or TRACON, center in Elgin, Ill., Tuesday, May 13, 2014, after smoke at the radar facility forced a ground stop to all incoming and outgoing flights at both of Chicago's airports. The Federal Aviation Administration says all its personnel at the facility were evacuated. (AP Photo/Daily Herald, Brian Hill) MANDATORY CREDIT, MAGS OUT (Credit: AP)
(AP) -- About 700 flights were canceled Tuesday at Chicago's two airports after an electrical problem sent smoke into the control room of a regional radar facility, forcing officials to temporarily halt all air traffic at one of the nation's busiest aviation crossroads.
The Federal Aviation Administration said all personnel were evacuated from the radar facility in suburban Elgin around 11:30...
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