Today in 1910, air-to-ground radio transmission is born; 1913, the first loop-the-loop maneuver is performed; in 1939, the jet age begins with the first flight of the Heinkel 178; 2006, Comair 5191 crashes in Lexington, Kentucky.
An electrical fire combined with foggy weather to shut down a runway at Toronto's Pearson International Airport Sunday morning, causing dozens of flights to be cancelled.