The flight status board in Terminal 1 at O' Hare International Airport reflects several types of flight delays, Tuesday, May 13, 2014, in Chicago. Smoke in a regional radar facility forced a halt to ... more 
The flight status board in Terminal 1 at O' Hare International Airport reflects several types of flight delays, Tuesday, May 13, 2014, in Chicago. Smoke in a regional radar facility forced a halt to all incoming and outgoing flights at both of Chicago’s airports. The Federal Aviation Administration says all its personnel were evacuated from the Chicago Terminal Radar Approach Control, or TRACON, facility in suburban Elgin at around 11:30 a.m. Tuesday.(AP Photo/Charles Rex Arbogast) less 
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Associated Press | Photo By Charles Rex Arbogast
Tue, May 13, 2014 4:09 PM EDT