Dan Wheldon loved to drive fast, from the time he first took the wheel of a go-kart when he was 4 years old, but the two-time Indianapolis 500 winner had begun to have concerns about the speeds cars were reaching on the IndyCar circuit.
He and other drivers had also expressed concern about the conditions for Sunday's IndyCar series final at the Las Vegas Motor Speedway.
It was crowded -- 34 cars -- and drivers were speeding, even by Indy standards, getting up to 225 mph. As ABC News' Josh Elliott noted, "Even the tiniest mistake can touch off wrecks like we see today."