Doug Skidmore, a Big O Tires franchisee in Clarksville, Ind., and his wife Bridgid attend their 15th U.S. Nationals.
Attendees watch the crew prepare the engine for the Kalitta Motorsports at the Mac Tools U.S. Nationals a the Lucas Oil Raceway in Indianapolis, Ind.
Tom Gorman, left, presents Mac Tools to attendees for the 24th year at the U.S. Nationals in Indianapolis.
John Paul, left, and Mark Scranton of Hoosier Hills Career Center in Bloomington, Ind. talk engineering design at the U.S. Nationals in Indianapolis.
The crew preps a race car at the Service Central hospitality tent.
Graham Pitcock of B & R Auto in Dublin, Ohio likes the chance to see new power tools at the U.S. Nationals In Indianapolis.
Race cars made spectators well aware of the products their maintenance crews used.
Crews ready the race cars for qualifying rounds.
Summit Racing Equipment entered a camaro driven by Jason Line.
Bolttech entered a car in the alcohol dragster competition.
Centre Point Collision Centers entered a car in the alcohol funny car event.
Lucas Oil sponsored a variety of cars in different categories.
Permatex entered a car in the alcohol funny car event.
An establishment called Charlie's World Famous Bar and Grill entered a car.
Attendees check out Mac Tools at Tom Gorman Tool Sales tent.
Jessie Snyder of the Kalitta Motorsports crew prepares to disassemble the engine.
Will Reed, left, and Andrew Waits of driver Doug Kalitta's crew practice disassembling the engine before the race.
Chris Foster of Davenport, Ia. drove a car entered by Foster Racing in the alcohol funny car event.
Tens of thousands of drag racing enthusiasts converged at the Lucas Oil Raceway in Indianapolis, Ind. On Sept. 8 and 9, 2012 to cheer on their favorite pro stock cars, motorcycles, and Funny Cars for the 58th annual Mac Tools U.S. Nationals presented by Auto Plus.