According to AP:
"IndyCar is very sad to announce that Dan Wheldon has passed away from unsurvivable injuries," IndyCar CEO Randy Bernard said. "Our thoughts and prayers are with his family today. IndyCar, its drivers and owners, have decided to end the race. In honor of Dan Wheldon, the drivers have decided to do a five-lap salute to in his honor."
Three other drivers, including championship contender Will Power, were hurt in the pileup.
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