Welcome to the third running of the NASCAR Super Weekend at the famed 2.5-mile oval of the 105-year old Indianapolis Motor Speedway.
The stock cars of the Nationwide and Sprint Cup series practice and compete Friday through Sunday, but first, the sports cars.
Under perfect, sunny weather, the TUDOR United SportsCar Championship arrived at the Indianapolis Motor Speedway - the first time the unified sports car championship has ever competed at the Brickyard.
The Grand-American series had competed here the last two years with the NASCAR Super Weekend (sports cars, Nationwide, and Sprint Cup), but this is the first time many of the former American Le Mans Series teams have been on the IMS 2.439-mile infield road course.
In the day's first practice session, the #1 HPD ARX-03b prototype of Scott Sharp and Ryan Dalziel was quickest at 1:18.349 sec. (112.068 mph).