25 July 2013
Delta Flight DL-903 , Boeing 757-200 , from Detroit to Florida it was en route for around one hour when the crew reported smoke in cockpit.The crew declared an emergency and decided to divert back to Detroit , but after little bit they change mind and diverted to Cincinnati Northern Kentucky International Airport
Cincinnati Northern Kentucky International Airport
Source
http://www.eaglecountryonline.com/news.php?nID=6007
http://flightaware.com/live/flight/DAL903/history/20130725/2340Z/KDTW/KFLL