INDIANAPOLIS, May 25 -- Over the final laps of Sunday's crash-filled Indianapolis 500, Scott Dixon showed exactly why he's known as the 'The Iceman.'

Dixon remained cool under the most extreme pressure, deftly navigating lapped traffic and holding off a hard-charging Vitor Meira for his breakthrough victory at the Brickyard in the race's 92nd running, the first since open-wheel racing's reunification in February.

Meira, driving for under-funded Panther Racing, finished a surprising second, 1.7 seconds behind Dixon, and...