Mario Andretti, an Indy 500, Daytona 500, and Formula 1 champion, autographs a helmet during the Indy 500 Centennial Tour, Ramstein Air Base, Germany, Jan. 14, 2011. The Indy 500 Centennial tour brings Indy racing teams to Europe and the Middle East over a 10 day tour to honor and boost morale for service members and their families. (U.S. Air Force photo/Senior Airman Caleb Pierce)