Drivers take the green flag at the start of the Daytona 500 NASCAR Sprint Cup Series auto race, Sunday, Feb. 24, 2013, at Daytona International Speedway in Daytona Beach, Fla. (AP Photo/Chris O'Meara)

Associated Press
Drivers take the green flag at the start of the Daytona 500 NASCAR Sprint Cup Series auto race, Sunday, Feb. 24, 2013, at Daytona International Speedway in Daytona Beach, Fla. (AP Photo/Chris O'Meara)
Drivers take the green flag at the start of the Daytona 500 NASCAR Sprint Cup Series auto race, Sunday, Feb. 24, 2013, at Daytona International Speedway in Daytona Beach, Fla. (AP Photo/Chris O'Meara)
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