FILE - In this May 30, 1967, file photo, Mario Andretti (1) leads the field at the start of the 51st running of the Indianapolis 500 at Indianapolis Motor Speedway in Indianapolis. The race had to be stopped for rain, and was restarted the following day. Gordon Johncock (3), far left, and A.J. Foyt (14), center, the eventual race winner, also compete. When it came to deciding the greatest rivalry, Foyt, Andretti and Bobby Unser received the most attention. 1986 winner Bobby Rahal says "the greatest rivalry had to be A.J. Foyt against anyone else." (AP Photo, File)