Here are five things to know about what's going on at Daytona International Speedway in advance of the season-opening Daytona 500 on Feb. 23: STEWART RETURNS: Three-time NASCAR champion Tony Stewart is back. Stewart returned to a race car Friday for the first time since breaking two bones in his right leg in a sprint-car crash in August. Stewart logged a combined 50 laps - more than any other driver - during two practice sessions for the Sprint Unlimited exhibition race Saturday night. It was like putting on an old pair of shoes again.'' SPEED THRILLS: Denny Hamlin posted the fastest lap in practice for the Sprint Unlimited exhibition race, which kicks off the NASCAR season Saturday night.
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